178 Comments

1. mervs / December 10, 2012

   Awesome thread and I very much needed your help. I followed your instructions and when I ran the code java -version it gave me an error telling me that the command does not exist. I troubleshooted and the issue I found is that the JRE folder is missing under usr/java/latest folder. And no matter how many times I run these commands:

   alternatives –install /usr/bin/java java /usr/java/latest/jre/bin/java 20000
   alternatives –install /usr/bin/javaws javaws /usr/java/latest/jre/bin/javaws 20000

   It still will not create the folders thus I believe the cause of the Java command not found issue. Could you please help? I would appreciate any reply:

   Reply
   • JR / December 11, 2012

     Hi mervs,

     Actually alternatives –install commands doesn’t create folders, it just create symbolic links. Could you post output of following commands:

     rpm -qa jre\* jdk\*   ls -la /usr/java   ls -la /usr/java/jre*   ls -la /usr/java/jdk*

     Reply
2. Felippe / January 11, 2013

   Amazing post guys! Very useful !

   Reply
3. el_minjo / January 16, 2013

   Thanks very much for the post!

   Reply
4. George Tsvetanov / January 19, 2013

   Hi, thanks for helpful lessons but here I got an error: http://i45.tinypic.com/6ql9g5.png

   So what I can do and install this java package?

   Best regards,
   George!

   Reply
   • JR / January 20, 2013

     Hi George,

     You can ignore those .pack file errors, all jar packages are unpacked successfully (without errors). .pack files are used by Java Web Start clients to retrieve and unpack JAR files for Java programs. So these errors doesn’t affect the JRE / JDK functionality when you install it using RPM package.

     But only rpm installation is not enough, you have to setup your new Java version also, so first install rpm, ignore .pack errors and then follow this guide.

     Reply
     • Richard / January 22, 2013

       I have the exactly same problem. How can I ignore those .pack errors?
       when I try to do it again it says ” package jdk-2000:1.7.0_11-fcs.x86_64 is already installed” is the jdk completely installed?

       Thanks

       Reply
       • JR / January 24, 2013

         Hi Richard,

         Yes you have JDK package installed just normally, when you get “package jdk-2000:1.7.0_11-fcs.x86_64 is already installed”, and it’s completely installed even if you get those .pack file errors and then next steo is just setup java, javac, etc.

         Reply
       • George Tsvetanov / January 24, 2013

         Hi, Richard, just continue with the installation. This is not a real problem for you :)

         JR, thank you, mate!

         Reply
         • Richard / January 24, 2013

           Well thanks a lot JR and George , it really works 100% now.

           Reply
           • JR / January 24, 2013

             Excellent! :)

             Reply
5. Casier Fred / January 26, 2013

   Hi,
   I slightly modified your alternatives approach as follows:

   alternatives –verbose –install /usr/bin/java java /usr/java/latest/jre/b$
   –slave /usr/bin/JAVA_HOME JAVA_HOME /usr/java/latest \
   –slave /usr/bin/javaws javaws /usr/java/latest/jre/bin/javaws \
   –slave /usr/lib/mozilla/plugins/libjavaplugin.so libjavaplugin.so /usr/java/l$
   –slave /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so.x86_64 /u$
   –slave /usr/bin/javac javac /usr/java/latest/bin/javac \
   –slave /usr/bin/jar jar /usr/java/latest/bin/jar

   Later on, I do
   export JAVA_HOME=/etc/alternatives/JAVA_HOME

   In this way, I limit inconsistency risks further.

   Thanks for your great blog.

   Reply
   • JR / January 26, 2013

     Hi Casier,

     This is nice alternatives approach, thanks for sharing!

     Reply
6. Renato / February 1, 2013

   Straightforward, Brilliant!

   Thanks

   Reply
   • Renato / February 2, 2013

     Just one point to review…

     Now I noticed that Firefox plugin is not getting updated. Just like the screenshot you have posted. Installed revision 11 but the “Check libjavaplugin.so with restarting Mozilla…” is showing revision 10.

     In my environment I have similiar behavior: installed revision 11 but the Firefox about:plugins is showing previous version 05.

     Nevertheless, when running firefox as root the plugin is shown updated.

     Please help!
     TIA

     Reply
     • JR / February 5, 2013

       Hi Renato,

       Try following:

       ## 32-bit ## alternatives --config libjavaplugin.so   ## 64-bit ## alternatives --config libjavaplugin.so.x86_64

       And then select right version and restart Firefox (or even log out and back in).

       Reply
       • Renato / February 5, 2013

         Wow. You’ve got the point!

         With the recent revision 13 made available, I amended the procedure according to .13 and it is working perfectly.

         Thanks so much for your great help JR.

         Reply
         • JR / February 5, 2013

           Excellent! :)

           I updated this guide to Java 7u13 too. :) Btw. if you want stay up to date little bit easier then you can use “latest method” when you run alternatives –install, like following:

           ## Example JRE 64-bit ## alternatives --install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so.x86_64 /usr/java/latest/lib/amd64/libnpjp2.so 20000

           You can check where latest point on file system:

           ls -la /usr/bin/java

           Reply
           • Peter / March 20, 2013

             Should that be “ls -la /usr/bin/java” ? (Running CentOS 6.4 64-bit)

             Reply
             • JR / March 22, 2013

               Hi Peter,

               Yes it should :) I updated this comment, thanks!

               Reply
7. Praveen / February 4, 2013

   Nice one..

   Reply
8. Ben / February 8, 2013

   After struggling to do this for so long and confusing instructions for CENTOS 4/5, the instructions above are awesome. Thank you!

   Reply
9. Topher / February 12, 2013

   Question for you: I’ve been teaching myself java programming through the free online class that Stanford offers, but the sample lessons they provide require a 6 runtime enviroment. I found an rpm file of openjdk 6 but when I try to install it, it stops my since I already have openjdk7. How can I install these side by side?

   Reply
   • JR / February 15, 2013

     Hi Topher,

     You could try following command to install OpenJDK 6, when you have OpenJDK 7 installed:

     rpm --nodeps -ihv /path/to/java-1.6.0-openjdk-1.6.*.rpm

     Reply
     • Topher / February 18, 2013

       Thanks! Worked like a charm!

       Reply
       • JR / February 20, 2013

         Excellent! :)

         Reply
10. nightshift / February 20, 2013

    Hi, at the first step, when i try to install i get this message :

    [root@fedoracore Downloads]# rpm -Uvh jdk-7u15-linux-x64.rpm
    Preparing… ################################# [100%]
    Updating / installing…
    1:jdk-2000:1.7.0_15-fcs ################################# [100%]
    Unpacking JAR files…
    rt.jar…
    Error: Could not open input file: /usr/java/jdk1.7.0_15/jre/lib/rt.pack
    jsse.jar…
    Error: Could not open input file: /usr/java/jdk1.7.0_15/jre/lib/jsse.pack
    charsets.jar…
    Error: Could not open input file: /usr/java/jdk1.7.0_15/jre/lib/charsets.pack
    tools.jar…
    Error: Could not open input file: /usr/java/jdk1.7.0_15/lib/tools.pack
    localedata.jar…
    Error: Could not open input file: /usr/java/jdk1.7.0_15/jre/lib/ext/localedata.pack

    What is the cause of this, i both tried to install jde and jdk but result is the same. Thank you very much for your guides.

    Reply
11. nightshift / February 20, 2013

    I do not know what caused my problem but i removed all java versions with this command :

    yum remove *java*

    After that i rebooted my fedora 18 and followed the guide again with the new version of jre and jdk 1.7u15

    I hope this helps.

    Reply
    • JR / February 21, 2013

      Hi nightshift,

      You can ignore those .pack file errors, all jar packages are unpacked successfully (without errors). .pack files are used by Java Web Start clients to retrieve and unpack JAR files for Java programs. So these errors doesn’t affect the JRE / JDK functionality when you install it using RPM package.

      Reply
12. Eder Anillo Lora / February 23, 2013

    This tutorial rock!

    Reply
13. Abelman / February 25, 2013

    Hi JR,

    Thanks a lot you save my night!

    Reply
14. txe / February 28, 2013

    Hi, I wish you could give a hand on this, my friend.
    After download java-re as you can see below, all I got is this output:
    
cd Downloads/
[root@localhost Downloads]# ls
jre-7u15-linux-i586.rpm
[root@localhost Downloads]# rpm -Uvh /path/to/binary/jre-7u15-linux-i586.rpm
error: open of /path/to/binary/jre-7u15-linux-i586.rpm failed: No such file or directory
[root@localhost Downloads]#

    I don’t what I’m overlooking, I’d appreciate any clue.
    Thanks.
    Txe

    Reply
    • JR / February 28, 2013

      Hi txe,

      /path/to/binary means path to jre-7u15-linux-*.rpm file, so if you are downloads path, then your path to binary is “empty” or ./

      Same command on your case:

      rpm -Uvh jre-7u15-linux-i586.rpm

      Reply
      • txe / February 28, 2013

        Hi JR,
        Thanks for your reply.
        Yes you are absolutely right, I should have been cloud (it was a hard long day.. sorry.) However I’m really lost now. The output I got when I type (being root) $rpm -Uvh jre-7u15-linux-i586.rpm is that the package is already installed ๏๏.

        So what I did was to carry on whit the rest of your guide. In my case:
        ## java ##
        alternatives --install /usr/bin/java java /usr/java/jre-1.7.0_15-fcs.i586/bin/java 20000

        ## javaws ##
        alternatives --install /usr/bin/javaws javaws /usr/java/jre-1.7.0_15-fcs.i586/bin/javaws 20000

        ## Java Browser (Mozilla) Plugin 32-bit ##
        alternatives --install /usr/lib/mozilla/plugins/libjavaplugin.so libjavaplugin.so /usr/java/jre-1.7.0_15-fcs.i586/lib/i386/libnpjp2.so 20000 Whit no reply from cli in any of these cases so I though it was going OK. However when I type java –version this is the output I got:
        
[txe@localhost Downloads]$ java --version
bash: java: command not found...
[txe@localhost Downloads]$ which java
/usr/bin/which: no java in (/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/home/txe/.local/bin:/home/txe/bin)
[txe@localhost Downloads]$
        Any help, please?, please..
        Txe.

        Reply
        • txe / February 28, 2013

          Probably I typed wrong again I said, I tried also this lines with, and still unsuccessful.
          
          alternatives –install /usr/bin/java java /usr/java/jre-1.7.0_15/bin/java 20000
          alternatives –install /usr/bin/javaws javaws /usr/java/jre-1.7.0_15/bin/javaws 20000
          alternatives –install /usr/lib/mozilla/plugins/libjavaplugin.so libjavaplugin.so /usr/java/jre-1.7.0_15/lib/i386/libnpjp2.so 20000
          Txe

          Reply
          • JR / March 2, 2013

            Hi txe,

            Could you post output of following command:

            ls -la /usr/java

            Reply
            • txe / March 2, 2013

              Hi JR.
              Thanks for your reply
              This the output I got:
              
[txe@localhost ~]$ ls -la /usr/java
total 12
drwxr-xr-x. 3 root root 4096 Feb 27 23:52 .
drwxr-xr-x. 13 root root 4096 Feb 27 23:52 ..
lrwxrwxrwx. 1 root root 16 Feb 27 23:52 default -> /usr/java/latest
drwxr-xr-x. 6 root root 4096 Feb 27 23:52 jre1.7.0_15
lrwxrwxrwx. 1 root root 21 Feb 27 23:52 latest -> /usr/java/jre1.7.0_15
[txe@localhost ~]$


              Reply
              • JR / March 3, 2013

                Thanks, it looks good, could you then post output of following commands:

                alternatives --display java   alternatives --display javaws   alternatives --display libjavaplugin.so

                And then also output of following command:

                /usr/java/jre-1.7.0_15/bin/java --version

                Reply
                • txe / March 3, 2013

                  Hi JR,
                  Here it’s the output I got for each line, my friend:
                  Thanks.
                  
[txe@localhost ~]$ alternatives --display java
java - status is auto.
link currently points to /usr/java/latest/jre/bin/java
/usr/java/latest/jre/bin/java - priority 20000
slave keytool: (null)
slave orbd: (null)
slave pack200: (null)
slave rmid: (null)
slave rmiregistry: (null)
slave servertool: (null)
slave tnameserv: (null)
slave unpack200: (null)
slave jre_exports: (null)
slave jre: (null)
slave java.1.gz: (null)
slave keytool.1.gz: (null)
slave orbd.1.gz: (null)
slave pack200.1.gz: (null)
slave rmid.1.gz: (null)
slave rmiregistry.1.gz: (null)
slave servertool.1.gz: (null)
slave tnameserv.1.gz: (null)
slave unpack200.1.gz: (null)
/usr/java/jre-1.7.0_15-fcs.i586/bin/java - priority 20000
slave keytool: (null)
slave orbd: (null)
slave pack200: (null)
slave rmid: (null)
slave rmiregistry: (null)
slave servertool: (null)
slave tnameserv: (null)
slave unpack200: (null)
slave jre_exports: (null)
slave jre: (null)
slave java.1.gz: (null)
slave keytool.1.gz: (null)
slave orbd.1.gz: (null)
slave pack200.1.gz: (null)
slave rmid.1.gz: (null)
slave rmiregistry.1.gz: (null)
slave servertool.1.gz: (null)
slave tnameserv.1.gz: (null)
slave unpack200.1.gz: (null)
/usr/java/jre-1.7.0_15/bin/java - priority 20000
slave keytool: (null)
slave orbd: (null)
slave pack200: (null)
slave rmid: (null)
slave rmiregistry: (null)
slave servertool: (null)
slave tnameserv: (null)
slave unpack200: (null)
slave jre_exports: (null)
slave jre: (null)
slave java.1.gz: (null)
slave keytool.1.gz: (null)
slave orbd.1.gz: (null)
slave pack200.1.gz: (null)
slave rmid.1.gz: (null)
slave rmiregistry.1.gz: (null)
slave servertool.1.gz: (null)
slave tnameserv.1.gz: (null)
slave unpack200.1.gz: (null)
Current `best' version is /usr/java/latest/jre/bin/java.
[txe@localhost ~]$
------------------------
[txe@localhost ~]$ alternatives --display javaws
javaws - status is auto.
link currently points to /usr/java/jre-1.7.0_15-fcs.i586/bin/javaws
/usr/java/jre-1.7.0_15-fcs.i586/bin/javaws - priority 20000
/usr/java/jre-1.7.0_15/bin/javaws - priority 20000
Current `best' version is /usr/java/jre-1.7.0_15-fcs.i586/bin/javaws.
[txe@localhost ~]$
---------------------
[txe@localhost ~]$ alternatives --display libjavaplugin.so
libjavaplugin.so - status is auto.
link currently points to /usr/java/latest/jre/lib/i386/libnpjp2.so
/usr/java/latest/jre/lib/i386/libnpjp2.so - priority 20000
/usr/java/jdk1.7.0_15/jre/lib/i386/libnpjp2.so - priority 20000
/usr/java/jre-1.7.0_15-fcs.i586/lib/i386/libnpjp2.so - priority 20000
/usr/java/jre-1.7.0_15/lib/i386/libnpjp2.so - priority 20000
Current `best' version is /usr/java/latest/jre/lib/i386/libnpjp2.so.
[txe@localhost ~]$
----------------------
[txe@localhost ~]$ /usr/java/jre-1.7.0_15/bin/java --version
bash: /usr/java/jre-1.7.0_15/bin/java: No such file or directory
[txe@localhost ~]$

                  Reply
                  • JR / March 3, 2013

                    Sorry, I wrote actually wrong path, could you also post output of following commands:

                    /usr/java/jre1.7.0_15/bin/java --version   /usr/java/latest/bin/java --version

                    Reply
                    • txe / March 4, 2013

                      Hi JR,
                      Sorry, I should have replied here for keeping the thread, isn’t?. But once done I could not reverse the posting process. So re-post it, here again. Sorry to the inconvenience.
                      
[txe@localhost ~]$ /usr/java/jre1.7.0_15/bin/java --version
Unrecognized option: --version
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
[txe@localhost ~]$


[txe@localhost ~]$ /usr/java/latest/bin/java --version
Unrecognized option: --version
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
[txe@localhost ~]$

15. Pepinho DoSamba / February 28, 2013

    You deserve to go to heaven for taking the time and effort to write this article for people you don’t even know. Your work is highly appreciated!

    Reply
16. vinay kumar / March 1, 2013

    thanks for great support

    Reply
17. txe / March 3, 2013

    Hi JR,
    Thanks again. Here both outputs:
    
[txe@localhost ~]$ /usr/java/jre1.7.0_15/bin/java --version
Unrecognized option: --version
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
[txe@localhost ~]$

    ------------------------

    [txe@localhost ~]$ /usr/java/latest/bin/java --version
Unrecognized option: --version
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
[txe@localhost ~]$


    Reply
    • JR / March 4, 2013

      Let’s continue here, this discussion.

      First run following commands (remove your current linking):

      alternatives --remove java /usr/java/latest/jre/bin/java   alternatives --remove java /usr/java/jre-1.7.0_15-fcs.i586/bin/java   alternatives --remove java /usr/java/jre-1.7.0_15/bin/java   alternatives --remove javaws /usr/java/jre-1.7.0_15-fcs.i586/bin/javaws   alternatives --remove javaws /usr/java/jre-1.7.0_15/bin/javaws   alternatives --remove libjavaplugin.so /usr/java/latest/jre/lib/i386/libnpjp2.so   alternatives --remove libjavaplugin.so /usr/java/jdk1.7.0_15/jre/lib/i386/libnpjp2.so   alternatives --remove libjavaplugin.so /usr/java/jre-1.7.0_15-fcs.i586/lib/i386/libnpjp2.so   alternatives --remove libjavaplugin.so /usr/java/jre-1.7.0_15/lib/i386/libnpjp2.so

      Then install java, javaws and java plugin again:

      ## java ## alternatives --install /usr/bin/java java /usr/java/latest/bin/java 20000   ## javaws ## alternatives --install /usr/bin/javaws javaws /usr/java/latest/bin/javaws 20000   ## Java Browser (Mozilla) Plugin 32-bit ## alternatives --install /usr/lib/mozilla/plugins/libjavaplugin.so libjavaplugin.so /usr/java/latest/lib/i386/libnpjp2.so 20000

      Then try:

      java -version

      Reply
      • txe / March 4, 2013

        Hi JR,
        Thanks for your reply. This is the output I got now:
        
[root@localhost txe]# java -version
java version "1.7.0_15"
Java(TM) SE Runtime Environment (build 1.7.0_15-b03)
Java HotSpot(TM) Server VM (build 23.7-b01, mixed mode)
[root@localhost txe]#

        Then I checked out for plugins (about:plugins) on firefox and I can see them installed, though with a warning indication about using java on ff. (I hope it’s right thing using it..). Is there anything else I should do?
        I really appreciate your help.
        Txe.

        Reply
        • JR / March 6, 2013

          Hi txe,

          You got Java installed as it should be, but one thing to do now, is update installed Java JRE 7u15 to latest update 17, which fix Java browser plugin bug.

          Now when you use latest method, you can just download new package and install it using following command:

          rpm -Uvh /path/to/binary/jre-7u17-linux-i586.rpm

          Then you can check that it’s properly updated using following command:

          java -version

          And you can check browser plugin version on about:plugins page.

          Reply
          • txe / March 6, 2013

            Ah!. Ok. but don’t I have to uninstall the previous one version or something like that?
            Thanks!
            Txe.

            Reply
            • JR / March 11, 2013

              Hi txe,

              You can just update previous version with rpm -Uvh jre-7u17-linux-i586.rpm command, so you don’t have to uninstall it first.

              Reply
18. Tiago Hori / March 12, 2013

    Hi All,

    I found that on Fedora 18 the shared library libX11 is missing and without it, javaws won’t run. You can het it here: http://pkgs.org/fedora-18/fedora-i386/libX11-1.5.0-3.fc18.i686.rpm/download/

    T.

    Reply
    • JR / March 14, 2013

      Hi Tiago and thanks!

      You can also install it using yum:

      yum install libX11

      Reply
19. Aníbal Leite / March 14, 2013

    Thanks a lot for this very useful instructions!

    Best regards.

    Aníbal

    Reply
20. getcar / March 15, 2013

    I just tried to install JDK 7-17 on Fedora 18 and got the following error on Step 3. Your assistance would be appreciated:

    [root@localhost ~]# rpm -Uvh /var/tmp/jdk-7u17-linux-x64.rpm
    Preparing… ################################# [100%]
    Updating / installing…
    1:jdk-2000:1.7.0_17-fcs ################################# [100%]
    Unpacking JAR files…
    rt.jar…
    Error: Could not open input file: /usr/java/jdk1.7.0_17/jre/lib/rt.pack
    jsse.jar…
    Error: Could not open input file: /usr/java/jdk1.7.0_17/jre/lib/jsse.pack
    charsets.jar…
    Error: Could not open input file: /usr/java/jdk1.7.0_17/jre/lib/charsets.pack
    tools.jar…
    Error: Could not open input file: /usr/java/jdk1.7.0_17/lib/tools.pack
    localedata.jar…
    Error: Could not open input file: /usr/java/jdk1.7.0_17/jre/lib/ext/localedata.pack

    Reply
    • JR / March 19, 2013

      Hi getcar,

      You can ignore those .pack file errors, all jar packages are unpacked successfully (without errors). .pack files are used by Java Web Start clients to retrieve and unpack JAR files for Java programs. So these errors doesn’t affect the JRE / JDK functionality when you install it using RPM package.

      Reply
21. Mike / March 17, 2013

    I want to say first I am running Centos 6.4 in a virtuabox. I don’t think that should be an issue,

    I removed open java yum remove java
    then I downloaded the latest oracle java
    I installed rpm -ivh jdk-7u17-linux-x64.rpm
    then I alternatives –install /usr/bin/java java /usr/java/latest/jre/bin/java 20000
    then rnatives –install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.s
    then I linked the plugin to ~/.mozilla/plugins

    Now whenever I hit a java site firefox crashes. It goes down fast too. I don’t even know what to check

    If I look at about:plugins I see the java plugins
    java -version
    java version “1.7.0_17″
    Java(TM) SE Runtime Environment (build 1.7.0_17-b02)
    Java Hotspot(TM) 64-Bit Server VM (Build 23.7-b01, mixed mode)

    any ideas on why firefox is crashing now would be appreciated.

    Thanks again,
    Mike

    Reply
    • JR / March 19, 2013

      Hi Mike,

      It’s not needed to link ~/.mozilla/plugins, if you run following command (Java JRE installation):

      alternatives --install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so.x86_64 /usr/java/latest/jre/lib/amd64/libnpjp2.so 20000

      So remove link from ~/.mozilla/plugins and check output of following command:

      ls -la /usr/lib64/mozilla/plugins/libjavaplugin.so

      Reply
      • Mike / March 19, 2013

        @pmkehdvs1001:~/.mozilla/plugins$ ls -la /usr/lib64/mozilla/plugins/libjavaplugin.so
        lrwxrwxrwx. 1 root root 41 Mar 16 22:45 /usr/lib64/mozilla/plugins/libjavaplugin.so -> /etc/alternatives/libjavaplugin.so.x86_64

        Ok done, but firefox still crashes on java pages. If I open firefox and type in javatest in the search bar it hangs for a second then disappears. If I type in cars it will work find and go to wesites with cars in them.

        Reply
        • JR / March 22, 2013

          Hi Mike,

          Could you post also output of following commands:

          ls -la ~/.mozilla/plugins   alternatives --display libjavaplugin.so.x86_64

          Reply
22. Mike / March 22, 2013

    Hi JR, Well after hours of playing with it, I remembered that I was building this in a virtualbox. I decided to just start over, and what ever I did wrong or whatever went wrong went right with the second VM. Thank you for your help. I am all good now.

    Thanks again,
    Mike

    Reply
    • JR / March 23, 2013

      Hi Mike,

      You are welcome! Nice to hear that you got it working!

      Reply
23. Jimmy Añazco / April 20, 2013

    Thanks very much for the post!

    Reply
24. Raphael / April 27, 2013

    Hi,
    Thanks for the nice guide. I tried to follow your instructions but I run across problems. I’ll be thankful if you can help me out.

    When I run
    $ rpm -Uvh ../jdk-7u21-linux-i586.rpm
    the output was:
    Preparing… ########################################### [100%]
    1:jdk ########################################### [100%]
    error: unpacking of archive failed on file /usr/java/jdk1.7.0_21/db/lib/derby.jar;517bea0a: cpio: Digest mismatch

    I tried to ignore it, but when I run
    alternatives –install /usr/lib/mozilla/plugins/libjavaplugin.so libjavaplugin.so /usr/java/latest/lib/i386/libnpjp2.so 20000
    the output was:
    failed to read link /usr/lib/mozilla/plugins/libjavaplugin.so: No such file or directory

    What is the problem here?
    Thanks,

    Reply