Install Sun/Oracle Java JDK/JRE 6u32 on Fedora 16/15, CentOS/RHEL 6.2/5.8

Updated by on May 9, 2012 in CentOS, Desktop Guides, Featured, Fedora, Linux, Programming, Red Hat (RHEL) | 109 comments

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Please note: This guide still working normally if you want install Sun/Oracle Java 6, but if you want latest Java 7 version, then check Howto Install Sun/Oracle Java JDK/JRE 7 on Fedora 16/15, CentOS 6.2/6.1/6/5.8 and Red Hat (RHEL) 6.3/6.2/6.1/6/5.8.

By default, Fedora 16/15/14/13/12 and CentOS/Red Hat (RHEL) 6.3/6.2/6.1/6/5.8 Linux operating systems use the OpenJDK Java, which is a good choice for normal use and it works with almost all the Java programs normally. OpenJDK is also easy to install and maintain with YUM package management, but some cases, Sun/Oracle Java installation is necessary, for example, if some program have to compile with Sun/Oracle Java or a particular program does not work without Sun/Oracle Java.

This is guide, howto install Oracle Java JDK/JRE 6u32 on Fedora 16/15/14/13/12, CentOS/RHEL 6.2/6.1/6/5.8.

Install Sun/Oracle Java JDK /JRE 6u32 on Fedora 16/15/14/13/12 CentOS 6.2/6.1/6/5.8, Red Hat (RHEL) 6.2/6.1/6/5.8

1. Download Sun/Oracle Java JDK or JRE RPMs

Download Sun/Oracle Java JDK or JRE from here (current version is JDK 6 Update 32) http://www.oracle.com/technetwork/java/javase/downloads/index.html.
Note: Select rpm.bin package (example jdk-6u32-linux-i586-rpm.bin, jre-6u32-linux-i586-rpm.bin, jdk-6u32-linux-x64-rpm.bin or jre-6u32-linux-x64-rpm.bin).

2. Change to root user.

sudo -i
## OR ##
su -

3a. Run Sun/Oracle Java JDK binary

chmod +x /path/to/file/jdk-6u32-linux-*-rpm.bin
/path/to/binary/jdk-6u32-linux-*-rpm.bin
 
## OR ##
 
sh /path/to/binary/jdk-6u32-linux-*-rpm.bin

Note: Use full file name (without asterix) if you have both i586 and x64 versions downloaded.

3b. Run Sun/Oracle Java JRE binary

chmod +x /path/to/file/jre-6u32-linux-*-rpm.bin
/path/to/binary/jre-6u32-linux-*-rpm.bin
 
## OR ##
 
sh /path/to/binary/jre-6u32-linux-*-rpm.bin

Note: Use full file name (without asterix) if you have both i586 and x64 versions downloaded.

4a. Install Sun/Oracle JDK java, javaws, libjavaplugin.so (for Firefox/Mozilla) and javac with alternatives –install command

## java ##
alternatives --install /usr/bin/java java /usr/java/jdk1.6.0_32/jre/bin/java 20000
## javaws (32-bit only) ##
alternatives --install /usr/bin/javaws javaws /usr/java/jdk1.6.0_32/jre/bin/javaws 20000
 
## Java Browser (Mozilla) Plugin 32-bit ##
alternatives --install /usr/lib/mozilla/plugins/libjavaplugin.so libjavaplugin.so /usr/java/jdk1.6.0_32/jre/lib/i386/libnpjp2.so 20000
 
## Java Browser (Mozilla) Plugin 64-bit ##
alternatives --install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so.x86_64 /usr/java/jdk1.6.0_32/jre/lib/amd64/libnpjp2.so 20000
 
## Install javac only if you installed JDK (Java Development Kit) package ##
alternatives --install /usr/bin/javac javac /usr/java/jdk1.6.0_32/bin/javac 20000
alternatives --install /usr/bin/jar jar /usr/java/jdk1.6.0_32/bin/jar 20000

4b. Install Sun/Oracle JRE java, javaws and libjavaplugin.so (for Firefox/Mozilla) with alternatives –install command

## java ##
alternatives --install /usr/bin/java java /usr/java/jre1.6.0_32/bin/java 20000
 
## javaws (32-bit only) ##
alternatives --install /usr/bin/javaws javaws /usr/java/jre1.6.0_32/bin/javaws 20000
 
## Java Browser (Mozilla) Plugin 32-bit ##
alternatives --install /usr/lib/mozilla/plugins/libjavaplugin.so libjavaplugin.so /usr/java/jre1.6.0_32/lib/i386/libnpjp2.so 20000
 
## Java Browser (Mozilla) Plugin 64-bit ##
alternatives --install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so.x86_64 /usr/java/jre1.6.0_32/lib/amd64/libnpjp2.so 20000

5. Check current java, javac, javaws and libjavaplugin.so versions

java -version
java version "1.6.0_32"
Java(TM) SE Runtime Environment (build 1.6.0_32-b04)
Java HotSpot(TM) Server VM (build 20.6-b01, mixed mode)
 
javac -version
javac 1.6.0_32
 
javaws
Java(TM) Web Start 1.6.0_32
[...]

Note: Check libjavaplugin.so with restarting Mozilla Firefox and writing about:plugins on address bar.

Check Sun Java Vrowser Plugin Installed on Firefox

Fedora 15:
Oracle/Sun Java installed on Fedora 15 64-bit

6. Swap between OpenJDK and Sun/Oracle JDK versions

alternatives --config java   # or javac or javaws or libjavaplugin.so
There are 4 programs which provide 'java'.
 
  Selection    Command
-----------------------------------------------
   1           /usr/lib/jvm/jre-1.6.0-openjdk/bin/java
   2           /usr/lib/jvm/jre-1.5.0-gcj/bin/java
*  3           /usr/java/jdk1.6.0_18/jre/bin/java
 + 4           /usr/java/jdk1.6.0_32/jre/bin/java
 
Enter to keep the current selection[+], or type selection number:

Note: java with [+] is currently on use

Post-Installation Setup

Add JAVA_HOME environment variable to /etc/profile file or $HOME/.bash_profile file

## export JAVA_HOME JDK ##
export JAVA_HOME="/usr/java/jdk1.6.0_32"
 
## export JAVA_HOME JRE ##
export JAVA_HOME="/usr/java/jre1.6.0_32"
Follow If Not True Then False Updates!

109 Comments

1 2
  1. szal / October 31, 2010

    Sorry to say this, but doesn’t work for me. Firstly, I installed the JRE RPM on Fedora 13 x86_64, and I found out that the paths to the binaries are slightly different for JRE than for JDK (/usr/java/jre1.6.0_22/bin/java; /usr/java/jre1.6.0_22/lib/amd64/libnpjp2.so (64bit, obviously); javaws links back to the directory it’s in, the website says to install the 32bit package for javaws functionality).

    But on top of this, even after having configured alternatives with the correct paths, SeaMonkey 2.0.8 doesn’t seem to see the plugin, and the check on the Java site fails. For now I have no idea what else to try.

    Reply
    • JR / November 1, 2010

      Hi szal,

      Thank you for corrections. I updated this guide to work better with Sun Java JRE version.

      And your problem. Do you have any other browser to test the libjavaplugin?

      Could you post following command output:

      alternatives --display libjavaplugin.so
      Reply
  2. szal / November 2, 2010

    Hi JR —

    Thanks for the reply. I tried the Java check with Konqueror after making sure that libjavaplugin.so is listed in the Plugins section of the settings. With Konqueror the site shows no result at all, it just switches to a page linking to the installation instructions after being done scanning.

    The output of alternatives –display libjavaplugin.so is:

    [root@zalle ~]# alternatives --display libjavaplugin.so
    libjavaplugin.so - status is manual.
    link currently points to /usr/java/jre1.6.0_22/lib/amd64/libnpjp2.so
    /usr/java/jre1.6.0_22/lib/amd64/libnpjp2.so - priority 20000
    Current `best' version is /usr/java/jre1.6.0_22/lib/amd64/libnpjp2.so.

    I appreciate your help and hope you have an idea.

    Greetings

    szal

    Reply
    • JR / November 2, 2010

      Hi again szal,

      I figure out that where the problem is and I improved this guide more. I even test this clean installed Fedora 13 64-bit, Sun Java JRE 64-bit and with SeaMonkey 2.0.8, Firefox 3.6.12.

      So to get Java Plugin to work, do following (as root)
      Remove current libjavaplugin with following command:

      alternatives --remove libjavaplugin.so /usr/java/jre1.6.0_22/lib/amd64/libnpjp2.so

      And then do the alternatives install again, with following command:

      alternatives --install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so.x86_64 /usr/java/jre1.6.0_22/lib/amd64/libnpjp2.so 20000

      Finally restart browser and it should work. :)

      Reply
  3. szal / November 4, 2010

    Works great, thanks again JR! :)

    Reply
  4. Jozsef / November 5, 2010

    Works! Thanks!
    But I did few things more before Firefox java plugin start working:
    # semanage fcontext -a -t execmem_exec_t ‘/usr/lib64/firefox-3.6/firefox’
    # chcon -t execmem_exec_t ‘/usr/lib64/firefox-3.6/firefox’
    # semanage fcontext -a -t execmem_exec_t ‘/usr/lib64/nspluginwrapper/plugin-config’
    # chcon -t execmem_exec_t ‘/usr/lib64/nspluginwrapper/plugin-config’

    Best,
    Jozsef

    Reply
    • leo / March 23, 2011

      Jozsef,

      Thanks! I’m using F14 (32-bit) and I installed the JDK etc. But, I was seeing the javaplugin library in the about:plugins page of firefox. So, I followed your instructions and the javaplugin works now.

      Maybe a quick note about this in the instructions would be helpful.

      Thanks again!

      Reply
  5. Madalinux / November 7, 2010

    I wanted to thank you for the tutorial and ask permission to write an translated version in my language (romanian) on my blog.

    Reply
    • JR / November 7, 2010

      Hi Madalinux, nice to see you here!

      Glad to hear that you like this guide. Yes you can write translated version of this tutorial to your blog in your own language. :)

      Reply
      • Madalinux / November 7, 2010

        thank you, will do and link to the article I translate :)

        Reply
  6. edwin / November 15, 2010

    I have problems with the version of java

    java -version
    Error: dl failure on line 508
    Error: failed /opt/jdk1.7.0/jre/lib/i386/server/libjvm.so, because /opt/jdk1.7.0/jre/lib/i386/server/libjvm.so: cannot enable executable stack as shared object requires: Permission denied

    thanks

    Reply
    • JR / November 15, 2010

      Hi edwin,

      Do you have installed Sun Java 7?

      Do you get some SELinux warning?

      You could try following as root:

      chcon -t execmem_exec_t ' /opt/jdk1.7.0/jre/lib/i386/server/libjvm.so'
      Reply
      • Kc / December 2, 2010

        Great write up by the way!!! really helped me out

        I did receive a SELinux warning. I ran “execstack -c /usr/lib64/mozilla/plugins/libjavaplugin.so” as root and that fixed it for me.

        —-Here was the SELinux warning—–
        Summary:

        SELinux is preventing /usr/lib64/firefox-3.6/firefox from making the program
        stack executable.

        Detailed Description:

        The firefox application attempted to make its stack executable. This is a
        potential security problem. This should never ever be necessary. Stack memory is
        not executable on most OSes these days and this will not change. Executable
        stack memory is one of the biggest security problems. BLAH,BLAH,BLAH (I shortened this because really irrelevant)

        Allowing Access:

        Sometimes a library is accidentally marked with the execstack flag, if you find
        a library with this flag you can clear it with the execstack -c LIBRARY_PATH.
        Then retry your application. If the app continues to not work, you can turn the
        flag back on with execstack -s LIBRARY_PATH.

        Reply
        • JR / December 3, 2010

          Hi Kc,

          Thanks for the notification and fix!

          Did you get this SELinux warning on Fedora 14?

          Reply
  7. Dennis / December 9, 2010

    Worked a charm! Please consider doing screencasts demonstrating same. I use screencast-o-matic

    thank you!
    Dennis

    Reply
  8. Dennis / December 9, 2010

    BTW, could you do a write up on how to get google chrome or chromium browser to play nice with java applets?

    Reply
  9. Dennis / December 9, 2010

    Jumped the gun. Java is installed.
    [user@localhost ~]$ java -version
    java version “1.6.0_22″
    Java(TM) SE Runtime Environment (build 1.6.0_22-b04)
    Java HotSpot(TM) Client VM (build 17.1-b03, mixed mode, sharing)

    mozilla about:plugins shows java plugins installed

    BUT when I try to run open a java applet I get this err in the terminal:

    LoadPlugin: failed to initialize shared library /usr/java/jre1.6.0_22/lib/i386/libnpjp2.so [/usr/java/jre1.6.0_22/lib/i386/libnpjp2.so: cannot enable executable stack as shared object requires: Permission denied]

    Can you please help? That error is the same error I got following Oracle’s ‘exact’ instructions. “Exact” because there is a human to mess it up, me. :(

    All help appreciated!
    Dennis

    Reply
    • JR / December 9, 2010

      Hi Dennis,

      I think that SELinux is causing this error.

      Could you post SELinux error report?

      Reply
      • Dennis / December 11, 2010

        Bingo. SELinux was the problem.
        This fixed it.

        914 sudo chcon -t execmem_exec_t ‘/usr/lib/firefox-3.6/firefox’
        915 echo to set SELINUX params to hopefully allow SOM to work

        Java applet now works. Thanks for the pointer and the very helpful info above!

        Dennis

        Reply
        • JR / December 11, 2010

          Excellent! Nice to hear that you got it working.

          Reply
          • pois / January 24, 2011

            sudo chcon -t execmem_exec_t ‘/usr/lib/firefox-3.6/firefox’

            above is the key to enable JRE in Firefox ………….i have been working for few days, finally this is the one solve my few days try and errors session

            thanks for the advice

            Reply
  10. maskimko / December 11, 2010

    Thanks a lot!!!! That works! Very useful article!

    Reply
  11. Suraj / January 1, 2011

    Hi,

    Thanks for such a wonderful and descriptive post.

    I’m facing an issue. After running all the steps mentioned in the post, when I try running the command “javac -version”, I’m getting the following error message:

    [root@localhost suraj]# javac -version
    bash: javac: command not found…
    Similar command is: ‘java’

    I’m quite new to Linux, and am using Fedora14. Please provide a solution to this problem

    Thanks in advance….
    Suraj

    Reply
    • JR / January 2, 2011

      Hi Suraj,

      Did you install the JRE or JDK?

      Reply
  12. xicobandito / January 6, 2011

    Thank you for your excellent guide. Great work!

    Reply
  13. noronorobeam / January 7, 2011

    this tutorial really helpful. thanks.

    Reply
  14. Suraj / January 9, 2011

    Hi,

    Probably I’ve messed up big time… :)
    Will try installing from scratch once again…

    Reply
  15. tsinik / January 22, 2011

    Congrats!!… this is a really good and comprehensive guide.
    Keep up the good work!

    Reply
  16. Barrie / February 4, 2011

    I have 64 bit RHEL 6 installed.
    Need to use ModJK for Apache and Tomcat.
    Installed jdk1.6.0_23 in /usr/java. From Oracles site downloaded jdk-6u23-linux-x64-rpm.bin.
    One of the instructions is to insert this in the /etc/httpd/conf/workers.properties file:

    # Unix – Sun VM or blackdown
    worker.inprocess.jvm_lib=$(workers.java_home)$(ps)jre$(ps)lib$(ps)i386$(ps)server$(ps)libjvm.so

    I only have the libjvm.so in:

    /usr/java/jdk1.6.0_23/jre/lib/amd64 ??????? I have a x86_64 Xeon. I presume ‘amd64′ doesny mean it is a amd processor??

    Is this the correct file for Redhat 6 64 bit? Should I ask Oracle instead?

    Reply
    • JR / February 4, 2011

      Hi Barrie,

      Amd64 should work OK with Xeon I guess, but this

      # Unix – Sun VM or blackdown
worker.inprocess.jvm_lib=$(workers.java_home)$(ps)jre$(ps)lib$(ps)i386$(ps)server$(ps)libjvm.so

      Need little modification, it should maybe look following:

      If you have libjvm.so directly under amd64 path then use:
worker.inprocess.jvm_lib=$(workers.java_home)$(ps)jre$(ps)lib$(ps)amd64$(ps)libjvm.so
 
OR if libjvm.so is under amd64/server/ directory then use:
worker.inprocess.jvm_lib=$(workers.java_home)$(ps)jre$(ps)lib$(ps)amd64$(ps)server$(ps)libjvm.so

      And here is therefore expected that you have:
      workers.java_home variable with /usr/java/jdk1.6.0_23/
      and
      ps variable with /

      Reply
  17. Hardy / February 10, 2011

    This guide is simply the best!

    Cheers!

    Reply
  18. LeadVisionary / February 18, 2011

    You forgot jar.

    alternatives –install /usr/bin/jar jar $JAVA_HOME/bin/jar 20000

    Reply
  19. Eduardo / February 19, 2011

    Whenever I try to install the JDK (either the rpm.bin file or the .bin file) I run into the following problem:

    ./jdk-6u24-linux-x64.bin: line 26: 4483 Aborted (core dumped) “$javaprefix/bin/java” com.sun.servicetag.Installer -source “$source” “$register_option” > /dev/null 2>&1

    Please note that I am using Fedora 14 x64 distro.

    Has anybody run into this problem?

    Reply
    • Andy / March 2, 2011

      Hi!

      /dev/null 2>&1″>

      Yes. I Solved this problem. Exit you X-Server and start install in to console

      Fedora 15

      Reply
  20. Fernando Cassia / March 4, 2011

    What is it with Linux people and the Copy-Paste religion? Why the insistance on providing “recipes” (series of instructions) that the users then must copy and paste. Why not just provide a BASH SCRIPT for download, that does all the work?.

    The users can then open the bash script and see what it does, too.

    FC

    Reply
    • JR / March 4, 2011

      Hi Fernando nice to see you here,

      Heh, Copy-Paste religion yes… :)

      For me at least it’s much more important to actually see what is really happening when I install something. If I use bash script to install something and it works like a charm then I’m probably not interested how program was really installed.

      Other drawbacks if using Bash scripts is the fact that, because they need usually root user permission, so for example, rootkits and other trash is very easy to install users computer. By the way this is one reason why Windows is sooooo vulnerable, because people install programs with installers from the Internet and don’t know what is really happening when they click “Yes” or “Ok”.

      And some cases bash scripts might be very complicated and have so many options that it is more difficult and time consuming use bash script than run just needed commands using copy-paste method.

      And yes this is my opinion on this bash script thing, but I of course understand your point. :D

      Reply
  21. Josh / March 4, 2011

    This is the best install that I have found. Thanks for doing this and keeping it up to date.

    Can you please explain a few things? I ran the rpm.bin from /usr/lib/jvm/ and that put a bunch of rpms in that directory. At first I didn’t understand that the install also put the jdk in /usr/java/. Why didn’t I have to run the rpm command? Did it install anything any place else, and if so what was it? Do I need to run the rpm command? Can I remove the rpms or are they being used or needed in the future?

    Thanks,
    Josh

    Reply
    • JR / March 4, 2011

      Hi Josh,

      Thanks for the compliments!

      Actually this rpm.bin package is installer which installs Java and it runs internally needed RPM commands. Yes, your JDK or JRE is installed on /usr/java directory.

      And you don’t need to run any rpm commands when you use installer and you don’t need installer (rpm.bin) or RPM’s after installation and you can remove those.

      Personally I install new JDK version when it comes and then remove old versions later. And installing new versions you can use exactly same method. And I try to keep this guide up-to-date, with OS versions and Java versions…

      Reply
  22. alex; / March 4, 2011

    Thank you. Excelent descriptions.

    Reply
  23. Godzilla's Mistress / March 8, 2011

    Hi,

    I can’t get this to work. When I use about:plugins in firefox, the java one is not listed. I am using fedora 14, and when I type “alternatives –display libjavaplugin.so” nothing happens.

    Thanks

    Reply
    • JR / March 9, 2011

      Hi Godzilla’s Mistress,

      Did you run some of following command (depending on your system 32-bit or 64-bit and installation JRE or JDK)

      ## JDK and 32-bit Linux ##
alternatives --install /usr/lib/mozilla/plugins/libjavaplugin.so libjavaplugin.so /usr/java/jdk1.6.0_24/jre/lib/i386/libnpjp2.so 20000
 
## JDK and 64-bit Linux ##
alternatives --install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so.x86_64 /usr/java/jdk1.6.0_24/jre/lib/amd64/libnpjp2.so 20000
 
## JRE and 32-bit Linux ##
alternatives --install /usr/lib/mozilla/plugins/libjavaplugin.so libjavaplugin.so /usr/java/jre1.6.0_24/lib/i386/libnpjp2.so 20000
 
## JRE and 64-bit Linux ##
alternatives --install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so.x86_64 /usr/java/jre1.6.0_24/lib/amd64/libnpjp2.so 20000
      Reply
      • raul / March 11, 2011

        i have the same problem When I use about:plugins in firefox, the java one is not listed. I am using fedora 14 64bits, and when I type “alternatives –display libjavaplugin.so” nothing happens.

        im already do this….
        ## JRE and 64-bit Linux ##
        alternatives –install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so.x86_64 /usr/java/jre1.6.0_24/lib/amd64/libnpjp2.so 20000

        PLease help..

        Reply
        • JR / March 18, 2011

          Hi raul,

          I can get libjavaplugin.so.x86_64 working on Fedora 14 (64-bit) system.

          Could out post output of following commands:

          ls -la /usr/java/jre1.6.0_24/lib/amd64/libnpjp2.so
 
alternatives --display libjavaplugin.so.x86_64
          Reply
          • raul / March 25, 2011

            [root@lenovo raul]# ls -la /usr/java/jre1.6.0_24/lib/amd64/libnpjp2.so
            -rwxr-xr-x. 1 root root 81456 feb 2 19:30 /usr/java/jre1.6.0_24/lib/amd64/libnpjp2.so
            [root@lenovo raul]# alternatives –display libjavaplugin.so.x86_64
            libjavaplugin.so.x86_64 – el estado es automático.
            el enlace apunta actualmente a /usr/java/jdk1.6.0_23/jre/lib/amd64/libnpjp2.so
            /usr/java/jdk1.6.0_23/jre/lib/amd64/libnpjp2.so – prioridad 20000
            /usr/java/jdk1.6.0_24/jre/lib/amd64/libnpjp2.so – prioridad 20000
            /usr/java/jre1.6.0_24/lib/amd64/libnpjp2.so – prioridad 20000
            /usr/java/default/lib/amd64/libnpjp2.so – prioridad 20000
            /usr/java/jre1.6.0_23/lib/amd64/libnpjp2.so – prioridad 20000
            La ‘mejor’ versión actual es /usr/java/jdk1.6.0_23/jre/lib/amd64/libnpjp2.so.
            [root@lenovo raul]#

            Reply
          • raul / March 25, 2011

            Reply
              • JR / March 28, 2011

                Hi again raul,

                Please try following:

                alternatives --config libjavaplugin.so.x86_64

                And select latest (and right) number from list. Then restart Firefox and check about:plugins again.

                Reply
                • raul / March 28, 2011

                  Hi JR,
                  Thanks for your time,
                  Now, i just have 1 simbolic link but i can’t, when performing the Firefox check using “about:plugins”, no java plugins are listed
                  please check this picture.
                  http://i286.photobucket.com/albums/ll113/lukeraza/java.png

                  Reply
                  • JR / March 30, 2011

                    Hi again raul,

                    Actually your problems sounds now SELinux problem, so try run following command as root:

                    Fedora 64-bit
chcon -t execmem_exec_t '/usr/lib64/firefox-3.6/firefox'
 
Fedora 32-bit
chcon -t execmem_exec_t '/usr/lib/firefox-3.6/firefox'

                    Then restart Firefox and check about:plugins again. Is it working?

                    Reply
                    • raul / April 2, 2011

                      Hi JR,

                      Now everything it’s running.
                      Thank you so much. You’re the best.

                      Raul.

  24. bob / March 14, 2011

    I am having the same problem that GM had with F14 — Sun JRE installation does not provide the java plugin for Firefox. When performing the Firefox check using “about:plugins”, no java plugins are listed. This is true regardless of whether I enable the default OpenJDK or the newly installed Oracle JRE as my default java installation.

    I am using an x86_64 system on a fresh install of Scientific Linux 6.0 with the latest updates. Yes, I did perform the following:

    ## JRE and 64-bit Linux ##
    alternatives --install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so.x86_64 /usr/java/jre1.6.0_24/lib/amd64/libnpjp2.so 20000

    For reference:

    # alternatives --config java

    There are 2 programs which provide 'java'.

    Selection Command
    -----------------------------------------------
    1 /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java
    *+ 2 /usr/java/jre1.6.0_24/bin/java

    # java -version
    java version "1.6.0_24"
    Java(TM) SE Runtime Environment (build 1.6.0_24-b07)

    # javaws
    Java(TM) Web Start 1.6.0_24

    The version of Firefox provided is 3.6.14.

    Reply
    • JR / March 18, 2011

      Hi bob,

      I can get libjavaplugin.so.x86_64 working on 64-bit system.

      Could out post output of following commands:

      ls -la /usr/java/jre1.6.0_24/lib/amd64/libnpjp2.so
 
alternatives --display libjavaplugin.so.x86_64
      Reply
  25. N.P. / March 23, 2011

    To use alternatives system properly you have to issue following commands:


    javaver=1.6.0
    mkdir /usr/lib/jvm-exports/java-${javaver}-sun;
    (
    cd /usr/lib/jvm-exports/java-${javaver}-sun;
    ln -s /usr/java/default/jre/lib/rt.jar jaas-${javaver}.jar
    ln -s /usr/java/default/jre/lib/jce.jar jce-${javaver}.jar
    ln -s /usr/java/default/jre/lib/rt.jar jdbc-stdext-${javaver}.jar
    ln -s /usr/java/default/jre/lib/rt.jar jdbc-stdext-3.0.jar
    ln -s /usr/java/default/jre/lib/rt.jar jndi-${javaver}.jar
    ln -s /usr/java/default/jre/lib/rt.jar jndi-cos-${javaver}.jar
    ln -s /usr/java/default/jre/lib/rt.jar jndi-ldap-${javaver}.jar
    ln -s /usr/java/default/jre/lib/rt.jar jndi-rmi-${javaver}.jar
    ln -s /usr/java/default/jre/lib/jsse.jar jsse-${javaver}.jar
    ln -s /usr/java/default/jre/lib/rt.jar sasl-${javaver}.jar
    ln -s jaas-${javaver}.jar jaas.jar
    ln -s jce-${javaver}.jar jce.jar
    ln -s jdbc-stdext-${javaver}.jar jdbc-stdext.jar
    ln -s jndi-${javaver}.jar jndi.jar
    ln -s jndi-cos-${javaver}.jar jndi-cos.jar
    ln -s jndi-ldap-${javaver}.jar jndi-ldap.jar
    ln -s jndi-rmi-${javaver}.jar jndi-rmi.jar
    ln -s jsse-${javaver}.jar jsse.jar
    ln -s sasl-${javaver}.jar sasl.jar
    )

    mkdir /usr/lib/jvm-exports/jre-${javaver}-sun;
    (
    cd /usr/lib/jvm-exports/jre-${javaver}-sun;
    ln -s /usr/java/default/lib/rt.jar jaas-${javaver}.jar
    ln -s /usr/java/default/lib/jce.jar jce-${javaver}.jar
    ln -s /usr/java/default/lib/rt.jar jdbc-stdext-${javaver}.jar
    ln -s /usr/java/default/lib/rt.jar jdbc-stdext-3.0.jar
    ln -s /usr/java/default/lib/rt.jar jndi-${javaver}.jar
    ln -s /usr/java/default/lib/rt.jar jndi-cos-${javaver}.jar
    ln -s /usr/java/default/lib/rt.jar jndi-ldap-${javaver}.jar
    ln -s /usr/java/default/lib/rt.jar jndi-rmi-${javaver}.jar
    ln -s /usr/java/default/lib/jsse.jar jsse-${javaver}.jar
    ln -s /usr/java/default/lib/rt.jar sasl-${javaver}.jar
    ln -s jaas-${javaver}.jar jaas.jar
    ln -s jce-${javaver}.jar jce.jar
    ln -s jdbc-stdext-${javaver}.jar jdbc-stdext.jar
    ln -s jndi-${javaver}.jar jndi.jar
    ln -s jndi-cos-${javaver}.jar jndi-cos.jar
    ln -s jndi-ldap-${javaver}.jar jndi-ldap.jar
    ln -s jndi-rmi-${javaver}.jar jndi-rmi.jar
    ln -s jsse-${javaver}.jar jsse.jar
    ln -s sasl-${javaver}.jar sasl.jar
    )

    # Java SDK
    alternatives --install /usr/bin/javac javac /usr/java/default/bin/javac 32000 \
    --slave /usr/lib/jvm/java java_sdk /usr/java/default \
    --slave /usr/lib/jvm-exports/java java_sdk_exports /usr/lib/jvm-exports/java-${javaver}-sun \
    --slave /usr/bin/appletviewer appletviewer /usr/java/default/bin/appletviewer \
    --slave /usr/bin/apt apt /usr/java/default/bin/apt \
    --slave /usr/bin/extcheck extcheck /usr/java/default/bin/extcheck \
    --slave /usr/bin/jar jar /usr/java/default/bin/jar \
    --slave /usr/bin/jarsigner jarsigner /usr/java/default/bin/jarsigner \
    --slave /usr/bin/javadoc javadoc /usr/java/default/bin/javadoc \
    --slave /usr/bin/javah javah /usr/java/default/bin/javah \
    --slave /usr/bin/javap javap /usr/java/default/bin/javap \
    --slave /usr/bin/jconsole jconsole /usr/java/default/bin/jconsole \
    --slave /usr/bin/jdb jdb /usr/java/default/bin/jdb \
    --slave /usr/bin/jhat jhat /usr/java/default/bin/jhat \
    --slave /usr/bin/jinfo jinfo /usr/java/default/bin/jinfo \
    --slave /usr/bin/jmap jmap /usr/java/default/bin/jmap \
    --slave /usr/bin/jps jps /usr/java/default/bin/jps \
    --slave /usr/bin/jrunscript jrunscript /usr/java/default/bin/jrunscript \
    --slave /usr/bin/jsadebugd jsadebugd /usr/java/default/bin/jsadebugd \
    --slave /usr/bin/jstack jstack /usr/java/default/bin/jstack \
    --slave /usr/bin/jstat jstat /usr/java/default/bin/jstat \
    --slave /usr/bin/jstatd jstatd /usr/java/default/bin/jstatd \
    --slave /usr/bin/jvisualvm jvisualvm /usr/java/default/bin/jvisualvm \
    --slave /usr/bin/native2ascii native2ascii /usr/java/default/bin/native2ascii \
    --slave /usr/bin/rmic rmic /usr/java/default/bin/rmic \
    --slave /usr/bin/schemagen schemagen /usr/java/default/bin/schemagen \
    --slave /usr/bin/serialver serialver /usr/java/default/bin/serialver \
    --slave /usr/bin/wsgen wsgen /usr/java/default/bin/wsgen \
    --slave /usr/bin/wsimport wsimport /usr/java/default/bin/wsimport \
    --slave /usr/bin/xjc xjc /usr/java/default/bin/xjc \
    --slave /usr/share/man/man1/appletviewer.1 appletviewer.1 /usr/java/default/man/man1/appletviewer.1 \
    --slave /usr/share/man/man1/apt.1 apt.1 /usr/java/default/man/man1/apt.1 \
    --slave /usr/share/man/man1/extcheck.1 extcheck.1 /usr/java/default/man/man1/extcheck.1 \
    --slave /usr/share/man/man1/jar.1 jar.1 /usr/java/default/man/man1/jar.1 \
    --slave /usr/share/man/man1/jarsigner.1 jarsigner.1 /usr/java/default/man/man1/jarsigner.1 \
    --slave /usr/share/man/man1/javac.1 javac.1 /usr/java/default/man/man1/javac.1 \
    --slave /usr/share/man/man1/javadoc.1 javadoc.1 /usr/java/default/man/man1/javadoc.1 \
    --slave /usr/share/man/man1/javah.1 javah.1 /usr/java/default/man/man1/javah.1 \
    --slave /usr/share/man/man1/javap.1 javap.1 /usr/java/default/man/man1/javap.1 \
    --slave /usr/share/man/man1/jconsole.1 jconsole.1 /usr/java/default/man/man1/jconsole.1 \
    --slave /usr/share/man/man1/jdb.1 jdb.1 /usr/java/default/man/man1/jdb.1 \
    --slave /usr/share/man/man1/jhat.1 jhat.1 /usr/java/default/man/man1/jhat.1 \
    --slave /usr/share/man/man1/jinfo.1 jinfo.1 /usr/java/default/man/man1/jinfo.1 \
    --slave /usr/share/man/man1/jmap.1 jmap.1 /usr/java/default/man/man1/jmap.1 \
    --slave /usr/share/man/man1/jps.1 jps.1 /usr/java/default/man/man1/jps.1 \
    --slave /usr/share/man/man1/jrunscript.1 jrunscript.1 /usr/java/default/man/man1/jrunscript.1 \
    --slave /usr/share/man/man1/jsadebugd.1 jsadebugd.1 /usr/java/default/man/man1/jsadebugd.1 \
    --slave /usr/share/man/man1/jstack.1 jstack.1 /usr/java/default/man/man1/jstack.1 \
    --slave /usr/share/man/man1/jstat.1 jstat.1 /usr/java/default/man/man1/jstat.1 \
    --slave /usr/share/man/man1/jstatd.1 jstatd.1 /usr/java/default/man/man1/jstatd.1 \
    --slave /usr/share/man/man1/native2ascii.1 native2ascii.1 /usr/java/default/man/man1/native2ascii.1 \
    --slave /usr/share/man/man1/rmic.1 rmic.1 /usr/java/default/man/man1/rmic.1 \
    --slave /usr/share/man/man1/schemagen.1 schemagen.1 /usr/java/default/man/man1/schemagen.1 \
    --slave /usr/share/man/man1/serialver.1 serialver.1 /usr/java/default/man/man1/serialver.1 \
    --slave /usr/share/man/man1/wsgen.1 wsgen.1 /usr/java/default/man/man1/wsgen.1 \
    --slave /usr/share/man/man1/wsimport.1 wsimport.1 /usr/java/default/man/man1/wsimport.1 \
    --slave /usr/share/man/man1/xjc.1 xjc.1 /usr/java/default/man/man1/xjc.1

    alternatives --install /usr/lib/jvm/java-sun java_sdk_sun /usr/java/default 32000 \
    --slave /usr/lib/jvm-exports/java-sun java_sdk_sun_exports /usr/lib/jvm-exports/java-${javaver}-sun

    alternatives --install /usr/lib/jvm/java-${javaver} java_sdk_${javaver} /usr/java/default 32000 \
    --slave /usr/lib/jvm-exports/java-${javaver} java_sdk_${javaver}_exports /usr/lib/jvm-exports/java-${javaver}-sun

    # Java Runtime Environment
    alternatives --verbose --install /usr/bin/java java /usr/java/default/jre/bin/java 32000 \
    --slave /usr/lib/jvm/jre jre /usr/java/default/jre \
    --slave /usr/lib/jvm-exports/jre jre_exports /usr/lib/jvm-exports/jre-${javaver}-sun \
    --slave /usr/bin/javaws javaws /usr/java/default/bin/javaws \
    --slave /usr/bin/ControlPanel ControlPanel /usr/java/default/bin/ControlPanel \
    --slave /usr/bin/keytool keytool /usr/java/default/bin/keytool \
    --slave /usr/bin/orbd orbd /usr/java/default/bin/orbd \
    --slave /usr/bin/pack200 pack200 /usr/java/default/bin/pack200 \
    --slave /usr/bin/policytool pack200 /usr/java/default/bin/policytool \
    --slave /usr/bin/rmid rmid /usr/java/default/bin/rmid \
    --slave /usr/bin/rmiregistry rmiregistry /usr/java/default/bin/rmiregistry \
    --slave /usr/bin/servertool servertool /usr/java/default/bin/servertool \
    --slave /usr/bin/tnameserv tnameserv /usr/java/default/bin/tnameserv \
    --slave /usr/bin/unpack200 unpack200 /usr/java/default/bin/unpack200 \
    --slave /usr/share/man/man1/java.1 java.1 /usr/java/default/man/man1/java.1 \
    --slave /usr/share/man/man1/keytool.1 keytool.1 /usr/java/default/man/man1/keytool.1 \
    --slave /usr/share/man/man1/orbd.1 orbd.1 /usr/java/default/man/man1/orbd.1 \
    --slave /usr/share/man/man1/pack200.1 pack200.1 /usr/java/default/man/man1/pack200.1 \
    --slave /usr/share/man/man1/policytool.1 policytool.1 /usr/java/default/man/man1/policytool.1 \
    --slave /usr/share/man/man1/rmid.1 rmid.1 /usr/java/default/man/man1/rmid.1 \
    --slave /usr/share/man/man1/rmiregistry.1 rmiregistry.1 /usr/java/default/man/man1/rmiregistry.1 \
    --slave /usr/share/man/man1/servertool.1 servertool.1 /usr/java/default/man/man1/servertool.1 \
    --slave /usr/share/man/man1/tnameserv.1 tnameserv.1 /usr/java/default/man/man1/tnameserv.1 \
    --slave /usr/share/man/man1/unpack200.1 unpack200.1 /usr/java/default/man/man1/unpack200.1

    alternatives --verbose --install /usr/lib/jvm/jre-sun jre_sun /usr/java/default/jre 32000 \
    --slave /usr/lib/jvm-exports/jre-sun jre_sun_exports /usr/lib/jvm-exports/jre-${javaver}-sun

    alternatives --verbose --install /usr/lib/jvm/jre-${javaver} jre_${javaver} /usr/java/default/jre 32000 \
    --slave /usr/lib/jvm-exports/jre-${javaver} jre_${javaver}_exports /usr/lib/jvm-exports/jre-${javaver}-sun

    # Java browser plugin
    alternatives --install /usr/lib/mozilla/plugins/libjavaplugin.so libjavaplugin.so /usr/java/default/jre/lib/i386/libnpjp2.so 32000

    unset javaver

    Reply
  26. bob / April 15, 2011

    [code]# ls -la /usr/java/jre1.6.0_24/lib/amd64/libnpjp2.so && alternatives --display libjavaplugin.so.x86_64
    -rwxr-xr-x. 1 root root 81456 Feb 2 19:30 /usr/java/jre1.6.0_24/lib/amd64/libnpjp2.so
    libjavaplugin.so.x86_64 - status is auto.
    link currently points to /usr/java/jdk1.6.0_24/jre/lib/amd64/libnpjp2.so
    /usr/java/jdk1.6.0_24/jre/lib/amd64/libnpjp2.so - priority 20000
    /usr/java/jre1.6.0_24/lib/amd64/libnpjp2.so - priority 20000
    Current `best' version is /usr/java/jdk1.6.0_24/jre/lib/amd64/libnpjp2.so.[/code]

    Reply
    • JR / April 15, 2011

      Hi bob,

      Actually this sounds SELinux problem so try run following command as root:

      chcon -t execmem_exec_t '/usr/lib64/firefox-3.6/firefox'

      And restart Firefox.

      Reply
  27. jjw3579 / April 20, 2011

    I’ve been trying like heck to get this working because I need Java for work, but I can’t seem to make any progress no matter what I try.

    I get the following:

    [jason@peregrine ~]$ java -version
    java version "1.6.0_24"


    [jason@peregrine ~]$ javac -version
    javac 1.6.0_24

    [jason@peregrine ~]$ ls -la /usr/java/jre1.6.0_24/lib/amd64/libnpjp2.so
    -rwxr-xr-x. 1 root root 81456 Feb 2 20:30 /usr/java/jre1.6.0_24/lib/amd64/libnpjp2.so

    [jason@peregrine ~]$ alternatives --display libjavaplugin.so.x86_64
    libjavaplugin.so.x86_64 - status is manual.
    link currently points to /usr/java/jre1.6.0_24/lib/amd64/libnpjp2.so
    /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/lib/amd64/IcedTeaPlugin.so - priority 16000
    /usr/java/default/lib/amd64/libnpjp2.so - priority 20000
    /usr/java/jre1.6.0_24/lib/amd64/libnpjp2.so - priority 20000
    Current `best' version is /usr/java/default/lib/amd64/libnpjp2.so.

    But I get nothing in FF 3.6, FF 4, or Chrome. Anyone have any ideas?

    Reply
    • JR / April 28, 2011

      Hi jjw3579,

      Try run following as root:

      execstack -c /usr/lib64/mozilla/plugins/libjavaplugin.so
      Reply
  28. Bob / April 23, 2011

    Scientific Linux 6.0: 64-bit
    Regarding my earlier installation failure on 64-bit Scientific Linux 6.0 and your proposed solution based on SEL: I had SELinux configured in permissive mode, so I am inclined to think that SEL isn’t the root of the problem. I am not working on the SL6 box at present, so I cannot pursue your proposed solution right now.

    <Fedora 14: 64-bit
    I am presently trying to perform your 64-bit JRE installation method on a fresh install of Fedora 14 with all of the current updates. I have followed your 64-bit instructions but I am still having problems. It looks like Java Web Start is not being installed:

    # java -version
    java version "1.6.0_24"
    Java(TM) SE Runtime Environment (build 1.6.0_24-b07)
    Java HotSpot(TM) 64-Bit Server VM (build 19.1-b02, mixed mode)

    # javac -version
    -bash: javac: command not found

    # javaws
    -bash: javaws: command not found

    # alternatives --config java

    There are 2 programs which provide 'java'.

    Selection Command
    -----------------------------------------------
    1 /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java
    *+ 2 /usr/java/jre1.6.0_24/bin/java

    Enter to keep the current selection[+], or type selection number:

    I understand that javac should not be installed when I am installing a JRE.
    What about javaws?

    Looking at your instructions, the 64-bit installation instructions do not appear to include a command that installs javaws. In section 4b, you have provided installation instructions for javaws on 32-bit platforms but not on 64-bit platforms. Is there a similar installation instruction that needs to be performed on 64-bit platforms?

    I also thought I’d point out that the Post-Installation Setup section of the guide appears correct for users of the JDK but doesn’t seem correct for people installing the JRE.

    Thanks for your help.

    Reply
    • JR / April 26, 2011

      Hi bob,

      Sun Java 64-bit version does not provide javaws, that’s why there is no installation instructions for that.

      I fixed post-installation setup, added also JRE.

      Reply
      • Glenn Lee Kian Giap / December 21, 2011

        I installed jdk 1.6.0_30 64bit and execute
        ls /usr/java/jdk1.6.0_30/bin
        and I find “javaws”

        Reply
  29. Bob / April 23, 2011

    Forgot to mention: the 64-bit installation on F14 is also not providing the Firefox plugin. about:config lists no java plugins for Firefox 3.6.16.

    Reply
    • JR / April 28, 2011

      Hi bob,

      Oracle Java 64-bit installation does provide Mozilla plugin, please post output of following commands:

      alternatives --display libjavaplugin.so.x86_64

      Check also that the Java plugin really exists and check your /var/log/audit/audit.log for SELinux messages.

      Reply
  30. AQ / April 29, 2011

    Hi, everyone, i would really appreciate if someone can give me an advice about this problem that is driving me crazy.

    I’ve installed Fedora 14 (Laughlin), and successfully installed JDK (following steps above), but sometimes (not always) when i execute Eclipse or Netbeans or Glassfish, a kill signal is send to the process because java runtime had an error (see error below).

    Thanks in advance for the help,

    #
    # A fatal error has been detected by the Java Runtime Environment:
    #
    # SIGSEGV (0xb) at pc=0x00007f602dca3761, pid=4054, tid=140051033437952
    #
    # JRE version: 6.0_25-b06
    # Java VM: Java HotSpot(TM) 64-Bit Server VM (20.0-b11 mixed mode linux-amd64 compressed oops)
    # Problematic frame:
    # V [libjvm.so+0x656761] PhaseLive::compute(unsigned)+0×241
    #
    # An error report file with more information is saved as:
    # /opt/apache-tomcat/bin/hs_err_pid4054.log
    #
    # If you would like to submit a bug report, please visit:
    # http://java.sun.com/webapps/bugreport/crash.jsp
    #

    Reply
  31. Francesco / May 18, 2011

    When I tipe sh jdk-6u25-linux-i586-rpm.bin, after pressing enter the error is:

    jdk-6u25-linux-i586-rpm.bin: line 94: 3128 Annullato (core dumped) “$javaprefix/bin/java” com.sun.servicetag.Installer -source “$source” “$register_option” > /dev/null 2>&1

    Done.

    How can I solve this?

    Reply
    • JR / May 20, 2011

      Hi Francesco,

      Actually your installation is OK, but you (and also I) got this with jdk-6u25-linux-i586-rpm.bin and jdk-6u25-linux-x64-rpm.bin because installer maybe try to open browser and failed. So you could continue your installation and get JDK working… :)

      Reply
  32. Mike / June 14, 2011

    unfortunately, it does not work for me. I am sure its somehow the configuration on my side.
    and I would appreciate some step by step help.
    I updated my Fedora 14 to 15. I have a x64 laptop. Firefox is 4.0.1. I followed instruction, even with different version of Java, but it didn’t help.

    weird thing is “alternatives –display libjavaplugin.so” does not return any thing.
    Please help.

    Reply
    • JR / June 15, 2011

      Hi Mike,

      Did you run:

      ## for JDK ##
alternatives --install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so.x86_64 /usr/java/jdk1.6.0_26/jre/lib/amd64/libnpjp2.so 20000
 
## for JRE ##
alternatives --install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so.x86_64 /usr/java/jre1.6.0_26/lib/amd64/libnpjp2.so 20000
      Reply
  33. Michael / June 17, 2011

    Very nice JR. Excellent work!!!!

    Reply
  34. Steve Shervais / June 28, 2011

    Trying to install latest version (this morning) of JRE6u26 on a clean (last night), updated (just now) install of Fedora 15, using your instructions. When I hit 3b, I get the following error:

    ./jre-6u26-linux-i586-rpm.bin: ./install.sfx.1796: /lib/ld-linux.so.2: bad ELF interpreter: No such file or directory

    Poking around, I find that this error is usually associated with out of date applications, but that doesn’t seem to be the case here.

    I hate to ask anyone to help me debug my system online, but I’d appreciate any ideas you have.

    Reply
    • JR / June 29, 2011

      Hi Steve,

      Could you post following info:

      uname -a

      and

      ls -lt /lib/ld-linux*
      Reply
      • Steve Shervais / June 29, 2011

        Here it is:
        sshervais@Fedora ~]$ uname -a
        Linux Fedora 2.6.38.8-32.fc15.x86_64 #1 SMP Mon Jun 13 19:49:05 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux

        [sshervais@Fedora ~]$ ls -lt /lib/ld-linux*
        ls: cannot access /lib/ld-linux*: No such file or directory

        Thanks for the help

        Reply
        • JR / June 29, 2011

          Hi again Steve,

          Try to install 64-bit version of JRE, because you have 64-bit version of Fedora. So download x64 package, not i586. I think this should solve your problem, but please let me know, if you get it installed or have any other problems.

          Reply
          • Steve Shervais / June 29, 2011

            THANK YOU!
            Worked like a charm. I think the problem was I got confused by the Oracle advice to install the 32-bit version. When I followed your instructions, everything Just Worked.

            Thanks again.
            Steve

            Reply
            • JR / June 30, 2011

              You’re welcome! Nice to hear that you get it working! :)

              Reply
  35. DPP / July 2, 2011

    I have fresh installed Fedora 14 with Firefox 3.6.10 and then installed jdk-6u26-linux-i586-rpm.bin in /usr/java dir. I have exactly issued alternatives –install commands for jdk 32-bits as in your guide.

    Output of alternatives –display libjavaplugin.so:

    libjavaplugin.so – status is auto.
    link currently points to /usr/java/jdk1.6.0_26/jre/lib/i386/libnpjp2.so
    /usr/lib/jvm/jre-1.6.0-openjdk/lib/i386/IcedTeaPlugin.so – priority 16000
    /usr/java/jdk1.6.0_26/jre/lib/i386/libnpjp2.so – priority 20000
    Current `best’ version is /usr/java/jdk1.6.0_26/jre/lib/i386/libnpjp2.so.

    But about:plugins does not show browser plugins.
    Waiting for your further guidance.

    DPP

    Reply
    • JR / July 2, 2011

      Hi DPP,

      This sounds SELinux problem, try run following:

      chcon -t execmem_exec_t '/usr/lib/firefox-3.6/firefox'
      Reply
      • DPP / July 3, 2011

        Hi JR

        Your diagnosis has worked!!

        I appreciate your in depth knowledge in Linux.

        My come come back to you in future.

        Reply
        • JR / July 5, 2011

          Hi again DPP,

          Excellent! You’re always welcome back!

          Reply
          • DPP / September 22, 2011

            I backed up the disk partition for Fedora 10 successfully using PING (Partimage Is Not Ghost). But PING can not backup the lvm2 partition for fedora 14. Can I backup Fedora 14 partition using Fedora 15 live CD or by any other disk partition backup utility?

            DPP

            Reply
            • JR / September 22, 2011

              Hi DPP,

              Try Clonezilla, should work with lvm2 partitions. :)

              Reply
  36. FC15 user / August 17, 2011

    Thank you!

    Reply
  37. Jariski / September 18, 2011

    Hello. I am a new user to Linux, and I use Fedora 15. I have followed your steps for the jre pack.

    I installed everything that’s necessary for it, but here is the problem.

    Firefox doesn’t pick it up. So, I went to firefox plugin directory, and found libjavaplugin.so and found out that the link is broken.

    I clicked on the file, and it said

    “This link cannot be used, because its target “/etc/alternatives/libjavaplugin.so” doesn’t exist.”

    So, I went there, and found out a file with the same name. And it in turn said.

    “This link cannot be used, because its target “/usr/java/jdk1.6.0_27/jre/lib/i386/libnpjp2.so” doesn’t exist”

    I went there is no –jdk1.6.0_27– Why is it happening so?

    Reply
    • JR / September 19, 2011

      Hi Jariski,

      So you tried to install JRE? Did you followed exactly just JRE part of guide or did you run some JDK commands?

      Reply
  38. Glenn Lee Kian Giap / December 20, 2011

    For the last instruction
    export JAVA_HOME=”/usr/java/jdk1.6.0_29″

    I need to edit the file every time I swap the jdk version? Any better way for this?

    Reply
    • JR / December 20, 2011

      Hi Glenn Lee Kian Giap,

      Could you first post output of following command:

      ls -la /usr/java
      Reply
      • Glenn Lee Kian Giap / December 20, 2011

        the output is not related to jdk1.6.0_29 because I have wipe out the previous VM and re-install using a clean CentOS

        Let me demonstrate what I was confused by,

        I follow this guide to install jdk1.6.0_30, I did the following:
        chmod +x /path/to/file/jdk-6u30-linux-*-rpm.bin
        /path/to/binary/jdk-6u30-linux-*-rpm.bin
        alternatives –install /usr/bin/java java /usr/java/jdk1.6.0_30/jre/bin/java 20000
        alternatives –install /usr/bin/javac javac /usr/java/jdk1.6.0_30/bin/javac 20000

        then, I follow your jdk 7 installation guide, I did the following:
        rpm -Uvh /path/to/binary/jdk-7u2-linux-i586.rpm
        alternatives –install /usr/bin/java java /usr/java/jdk1.7.0_02/jre/bin/java 20000
        alternatives –install /usr/bin/javac javac /usr/java/jdk1.7.0_02/bin/javac 20000

        After the installation, I didn’t export JAVA_HOME.

        then, I use alternatives to pick my java and javac version:

        # /usr/sbin/alternatives –config java

        There are 4 programs which provide ‘java’.

        Selection Command
        ———————————————–
        1 /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java
        2 /usr/lib/jvm/jre-1.4.2-gcj/bin/java
        *+ 3 /usr/java/jdk1.6.0_30/jre/bin/java
        4 /usr/java/jdk1.7.0_02/jre/bin/java

        Enter to keep the current selection[+], or type selection number: 3

        # /usr/sbin/alternatives –config java

        There are 4 programs which provide ‘java’.

        Selection Command
        ———————————————–
        1 /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java
        2 /usr/lib/jvm/jre-1.4.2-gcj/bin/java
        *+ 3 /usr/java/jdk1.6.0_30/jre/bin/java
        4 /usr/java/jdk1.7.0_02/jre/bin/java

        Enter to keep the current selection[+], or type selection number: 3

        # /usr/sbin/alternatives –config javac

        There are 2 programs which provide ‘javac’.

        Selection Command
        ———————————————–
        *+ 1 /usr/java/jdk1.6.0_30/bin/javac
        2 /usr/java/jdk1.7.0_02/bin/javac

        Enter to keep the current selection[+], or type selection number: 1

        then, I check my java and javac version:
        # java -version
        java version “1.7.0_02″
        Java(TM) SE Runtime Environment (build 1.7.0_02-b13)
        Java HotSpot(TM) 64-Bit Server VM (build 22.0-b10, mixed mode)
        # javac -version
        javac 1.7.0_02

        Sorry, I am newbie, I want to clarify the purpose of the command “alternatives –config java”(or javac)

        and is the above return from command “java -version” and “javac -version” expected, I mean I have pick 1.6.0_30, but this 2 commands still give me 1.7.0_02

        ———————
        Between, I issue the command you requested, not sure whether it helps:

        # ls -la /usr/java
        total 32
        drwxr-xr-x 3 root root 4096 Dec 20 23:24 .
        drwxr-xr-x 16 root root 4096 Nov 18 05:41 ..
        lrwxrwxrwx 1 root root 16 Dec 20 18:30 default -> /usr/java/latest
        drwxr-xr-x 8 root root 4096 Dec 20 23:24 jdk1.7.0_02
        lrwxrwxrwx 1 root root 21 Dec 20 23:24 latest -> /usr/java/jdk1.7.0_02

        Thanks for your help !

        Reply
        • Glenn Lee Kian Giap / December 20, 2011

          I read the result from
          ls -la /usr/java

          It seems like my jdk1.6.0_30 being removed by the installation process of jdk1.7.0_02

          I am very confuse now? I can’t keep both jdk at the same time?

          Reply
          • Glenn Lee Kian Giap / December 20, 2011

            I assume that my jdk1.6.0_30 was removed by the installation of jdk1.7.0_02, so I execute the following command to swap jdk version to open jdk:

            # /usr/sbin/alternatives –config java

            There are 4 programs which provide ‘java’.

            Selection Command
            ———————————————–
            + 1 /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java
            2 /usr/lib/jvm/jre-1.4.2-gcj/bin/java
            * 3 /usr/java/jdk1.6.0_30/jre/bin/java
            4 /usr/java/jdk1.7.0_02/jre/bin/java

            Enter to keep the current selection[+], or type selection number: 1

            # java -version
            java version “1.7.0_02″
            Java(TM) SE Runtime Environment (build 1.7.0_02-b13)
            Java HotSpot(TM) 64-Bit Server VM (build 22.0-b10, mixed mode)

            But the result is still jdk1.7.0

            ?.?

            Reply
            • Glenn Lee Kian Giap / December 20, 2011

              I found that this is because the /usr/bin/java is not pointing to /etc/alternatives/java, which is pointing to the jdk selected from “alternatives –config java”

              How can I solve this ?

              Reply
              • Glenn Lee Kian Giap / December 20, 2011

                I redo the jdk 1.6 installation with clean CentOS
                found that /usr/bin/java is pointing /etc/alternative/java

                After I complete jdk 1.7 installation
                /usr/bin/java pointing /usr/java/default/bin/java

                So, the problem occur after installation of jdk 1.7
                How should I solve it ? manage the symbolic link manually ?

                Sorry for posting so many comment replies because I am keep trying to find the solution, and share all the findings.

                Reply
  39. Glenn Lee Kian Giap / December 20, 2011

    For step4a.
    “## java ##
    alternatives –install /usr/bin/java java /usr/java/jdk1.6.0_29/jre/bin/java 20000″

    Will it be better if
    alternatives –install /etc/alternative/java java /usr/java/jdk1.6.0_29/jre/bin/java 20000″

    because originally the symbolic link is in this way
    /usr/bin/java -> /etc/alternative/java -> jdk_path

    Reply
    • JR / December 20, 2011

      Hi again Glenn,

      Why do you think that it would be?
      On alternatives system, the primary link for java must be /usr/bin/java

      Did you even try your own suggestion? :)

      Reply
      • Glenn Lee Kian Giap / December 20, 2011

        Oops, sorry about that. I submitted a bit earlier while trying, I was confuse by the symbolic link that time.

        Reply
  40. JR / December 20, 2011

    Hi Glenn,

    If you want to run both Java JDK 6 and Java JDK 7 at the same time on CentOS, then do following:

    1. Install Java JDK 7

    2. Verify that your Java 7 JDK installation is working as it should be

    3. Download Java JDK 6 select this time .bin package (not rpm.bin).

    4. Make your jdk-6u30-linux-i586.bin file executable:

    chmod +x /path/to/jdk-6u30-linux-i586.bin

    5. Change directory to /opt and run .bin file:

    cd /opt
 
/path/to/jdk-6u30-linux-i586.bin

    6. Check that jdk1.6.0_30 is on /opt directory:

    ls -la /opt

    7. Setup Java 6 JDK with alternatives install command:

    ## java ##
alternatives --install /usr/bin/java java /opt/jdk1.6.0_30/jre/bin/java 20000
## javaws (32-bit only) ##
alternatives --install /usr/bin/javaws javaws /opt/jdk1.6.0_30/jre/bin/javaws 20000
 
## Java Browser (Mozilla) Plugin 32-bit ##
alternatives --install /usr/lib/mozilla/plugins/libjavaplugin.so libjavaplugin.so /opt/jdk1.6.0_30/jre/lib/i386/libnpjp2.so 20000
 
## Java Browser (Mozilla) Plugin 64-bit ##
alternatives --install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so.x86_64 /opt/jdk1.6.0_30/jre/lib/amd64/libnpjp2.so 20000
 
## Install javac only if you installed JDK (Java Development Kit) package ##
alternatives --install /usr/bin/javac javac /opt/jdk1.6.0_30/bin/javac 20000
alternatives --install /usr/bin/jar jar /opt/jdk1.6.0_30/bin/jar 20000

    You are done!

    Then when you want change between Java 6 and Java 7 use simply alternatives –config command:

    alternatives --config java   # # or javac or javaws or libjavaplugin.so or jar
 
There are 2 programs which provide 'java'.
 
  Selection    Command
-----------------------------------------------
 + 1           /opt/jdk1.6.0_30/jre/bin/java
*  2           /usr/java/jdk1.7.0_02/jre/bin/java
 
Enter to keep the current selection[+], or type selection number:

    And yes with alternatives system you can easily run multiple versions of Java, but with rpm package management you can install just one Java. So you can have all Java 6 versions installed from u1, u2…u30 and all Java 7 versions installed (u1,u2…), and then you could have same time have OpenJDK 6 and OpenJDK 7 installed and so on…no problem at all…

    I hope this clarifies this issue and help you use Java 6 and Java 7 at the same time … :)

    If you have some problems feel free to ask… ;)

    Reply
    • Glenn Lee Kian Giap / December 21, 2011

      Thanks a lot of your help!

      Another issue is that (with or without installing jdk 1.6), after I have completed jdk 1.7 installation /usr/bin/java pointing /usr/java/default/bin/java which causes swapping jdk version using “alternatives –config java” doesn’t give the correct result when “java -version”. The reason behind is because /usr/bin/java need to point to /etc/alternative/java.

      Should I just re-create the symbolic link myself?

      Reply
      • Glenn Lee Kian Giap / December 21, 2011

        Now I feel that the jdk1.6 rpm.bin file installation from official website is actually giving a correct installation, the problem is on jdk1.7

        Reply
        • JR / December 21, 2011

          Just the first I have to say that Java 7 installation do not have (at least currently) any problems, I have used exactly same method dozens of times. So if your /usr/bin/java is pointing to /usr/java/default/bin/java, then you have not followed my guide, because my guide does not even use /usr/java/default/bin/java anywhere?

          Please could you post output of following commands:

          ls -la /usr/bin/java
 
ls -la /etc/alternatives/java
 
ls -la /usr/java/
 
ls -la /opt/
 
alternatives --display java
 
alternatives --config java
          Reply
  41. eurofalcon / December 28, 2011

    Hi JR, thank you for this blog, I couldnt get mine to work too, and was about to post a question, when I saw your answer to Raul, I am running KDE PLASMA on Fedora 16. It is the firewall issue, where you suggested this command chcon -t execmem_exec_t ‘/usr/lib64/firefox-3.6/firefox’

    only here is firefox 9 so needs to be changed to chcon -t execmem_exec_t ‘/usr/lib64/firefox/firefox’

    And this was also the issue
    *+ 1 /usr/java/jre1.6.0_22/lib/amd64/libnpjp2.so
    2 /usr/java/jdk1.6.0_30/jre/lib/amd64/libnpjp2.so

    Enter to keep the current selection[+], or type selection number: 2
    [root@localhost feodor]# alternatives –config libjavaplugin.so.x86_64

    There are 2 programs which provide ‘libjavaplugin.so.x86_64′.

    Selection Command
    ———————————————–
    * 1 /usr/java/jre1.6.0_22/lib/amd64/libnpjp2.so
    + 2 /usr/java/jdk1.6.0_30/jre/lib/amd64/libnpjp2.so

    I changed to number two, and everything was finally working, in Opera and FF

    Thank you again, without you I would go insane.

    Reply
    • JR / December 28, 2011

      Hi eurofalcon,

      You are welcome! Excellent to hear that you got it working! :)

      Reply
  42. Aron Griffis / January 19, 2012

    Very helpful. Worked perfectly to get the Java plugin running on Google Chrome on Fedora 16. (Chrome looks in the Firefox plugins dir automatically.) Thanks!

    Reply
  43. Tom / April 11, 2012

    I’m using Fedora 16 and trying to install the 32-bit JRE and 32-bit FireFox. I have a 64-bit machine. I need 32-bit Firefox/JRE, because I need to use a SSL VPN web app that only supports 32-bit.

    I’ve got 32-bit firefox installed with no problems, and I followed your directions in installting 32-bit JRE (on my 64-bit machine). Everything seems to work – I see the plugins in firefox; however, when I run the java test at java.com, it doesn’t work. Any ideas what I may be doing wrong? Any way for me to diagnose this?

    Thanks! Great info, by the way!

    Reply
    • JR / April 12, 2012

      Hi Tom,

      How do you installed 32-bit Firefox?

      Reply
      • Tom / April 12, 2012

        I added the repos for fedora 32-bit and was able to ‘yum install’ it.

        Reply
        • JR / April 17, 2012

          Hi again Tom,

          I tried this same style 32-bit Firefox & Java setup on 64-bit Fedora, but I have exactly same problem. Firefox shows Java plugin, but it won’t work. I also tested 32-bit Google Chrome and I can’t get 32-bit Java browser plugin work on 64-bit system with 32-bit browser.

          Reply
  44. Vicente / April 23, 2012

    Thanks for the instructions. However, I made a typo and can’t find the waqy to undo it. while typing the following command, I wrote /usr/lin/ –etc– instead of lib. Now, everytime I invoke java, an error message appears because there is no /usr/lin path… Tried unlink but didn’t work.

    alternatives –install /usr/lib/mozilla/plugins/libjavaplugin.so libjavaplugin.so /usr/java/jre1.6.0_31/lib/i386/libnpjp2.so 20000

    The solution is probably quite easy, but can’t find the way around it:

    Thanks.

    Reply
    • JR / April 24, 2012

      Hi Vicente,

      Try following to remove it:

      ## first check all ##
alternatives --display libjavaplugin.so
 
## then remove all with following command ##
alternatives --remove libjavaplugin.so /usr/java/jre1.6.0_31/lib/i386/libnpjp2.so

      And then install it again…please let me know do you get it working?

      Reply

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