YUM Downgrade Packages on Fedora, CentOS, Red Hat (RHEL)

This is quick tip, howto downgrade packages using YUM (example) on Fedora, CentOS, Red Hat (RHEL). This works simply with yum downgrade command and is very usefull when package(s) downgrade is needed some reason. YUM Downgrade Basic Usage Downgrade is very straightforward when package have not any dependencies, which affect the downgrade. YUM Downgrade Single Package yum downgrade package Example: yum downgrade hunspell-mr.noarch Setting up Downgrade Process Resolving Dependencies –> Running transaction check —> Package hunspell-mr.
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PHP 1st, 2nd, 3rd, 4th, 5th, 6th – PHP Add Ordinal Number Suffix

This is simple function to add English ordinal number suffix after normal number. Function takes number as a parameter and returns number with suffix, like: 1st, 2nd, 3rd, 4th, 5th, 6th… This is example table of ordinal numbers 1 to 100 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th 15th 16th 17th 18th 19th 20th 21st 22nd 23rd 24th 25th 26th 27th 28th 29th 30th 31st 32nd 33rd 34th 35th 36th 37th 38th 39th 40th 41st 42nd 43rd 44th 45th 46th 47th 48th 49th 50th 51st 52nd 53rd 54th 55th 56th 57th 58th 59th 60th 61st 62nd 63rd 64th 65th 66th 67th 68th 69th 70th 71st 72nd 73rd 74th 75th 76th 77th 78th 79th 80th 81st 82nd 83rd 84th 85th 86th 87th 88th 89th 90th 91st 92nd 93rd 94th 95th 96th 97th 98th 99th 100th Add Ordinal Suffix PHP Function <?
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Install WordPress 4.1.1 on Fedora 21/20, CentOS/RHEL 7/6.6/5.11

This is guide, howto install WordPress 4.1.1 with Nginx or Apache on Fedora 21/20/19, CentOS 7/6.6/5.11 and Red Hat (RHEL) 7/6.6/5.11 servers. WordPress needs web server with PHP and MariaDB or MySQL database. This guide uses Apache web server with PHP 5.6 or Nginx web server with PHP 5.6 (PHP-FPM) and MariaDB 10/5.5 database server or Mysql 5.6 database server. If you want to install WordPress with Apache then use a – [Apache] sections and if you want install WordPress with Nginx then use b – [Nginx] sections.
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Install Oracle Java 7u79/80 on Fedora 24/23, CentOS/RHEL 7.2/6.8/5.11

Please note: This guide still working normally if you want install Sun/Oracle Java 7, but if you want Java 8 version, then check Install Oracle Java JDK/JRE 8 on Fedora, CentOS/RHEL. This is guide, howto Install Sun/Oracle Java JDK and JRE 7 CPU (7u79) and PSU (7u80) on Fedora 24/23/22/21/20/19/18/17/16/15/14/13/12, CentOS 7.2/6.8/5.11, Red Hat (RHEL) 7.2/6.8/5.11. Read more, what is difference between CPU and PSU release. If you’re looking instruction for Sun/Oracle Java JDK/JRE version 6 installation on Fedora 20/19/18, CentOS/Red Hat (RHEL) 6.
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Find If Not True Then False on Facebook

I would like to welcome all new and old visitors to If Not True False Then site Facebook pages. Hopefully, this new Facebook page also helps to follow new blog posts. Of course, there is also other ways to follow this blog posts, simply using RSS Feed and Twitter. So following step is check out If Not True Then False Facebook page and like it. :) Like If Not True Then False on Facebook:
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Apache Userdir with SELinux on Fedora 31/30, CentOS/RHEL 8.0/7.7

This is quick guide howto enable Apache userdirs with SELinux on Fedora 31/30/29/28, CentOS 8.0/7.7/6.10 and Red Hat (RHEL) 8.0/7.7/6.10. This guide assumes that you have Apache (httpd) server installed on your system. This guide uses separeted userdir.conf without touching httpd.conf so later default httpd.conf can be overrided or whole configuration moved simply. This guide uses user called testuser and should be replaced by real user name(s). Enable Apache Userdirs 1.
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Fedora 14 Laughlin – Screenshots, Guides, Overview, What’s New, Features

Fedora 14 codename Laughlin is coming soon (2010-11-02) and Fedora 14 Beta final version is available very soon (2010-09-28). Check also Fedora 14 Install Guide or upgrade Fedora 13 to Fedora 14. I have done some testing with Fedora 14 (Alpha, Beta RC1 and Beta RC2) on my laptop and everything works smoothly. Soon I will revise all this blog Fedora guides and software installation instructions and update them to work with Fedora 14 Laughlin.
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List tar/tar.gz/tar.bz2 Contents – List all files in archive.tar

This is quick tip, howto list contents of tar, tar.gz and tar.bz2 files without unpacking file. This is very useful on server environment where any graphical tool is not available. This method is also very useful when tar, tar.gz or tar.bz2 packages are really big, something like hundreds of megabytes or gigabytes (for example backups). Overall, the key is the tar command with -t option. List the Contents of tar File List tar contents short command tar -tvf archive.
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PHP: Remove Last Character from String – substr / substr_replace / rtrim

This is a very common PHP question, how to remove last character from string in PHP? So here are three ways how to delete last character from string in PHP. Method 1 – PHP: Remove Last Character from String using substr and mb_substr substr and mb_substr commands usage substr($string, 0, -1); mb_substr($string, 0, -1); substr and mb_substr example: $string = "This is test string.."; echo $string . "\n"; // substr function echo "substr: " .
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Install SVN Server on Fedora 31/30, CentOS/RHEL 8.0/7.7

This is guide, howto install SVN (Subversion) server on Fedora 31/30/29/28, CentOS 8.0/7.7/6.10, Red Hat (RHEL) 8.0/7.7/6.10. What is SVN (Subversion)? Subversion is a free/open-source version control system. Subversion manages files and directories, and the changes made to them, over time. This allows you to recover older versions of your data, or examine the history of how your data changed. In this regard, many people think of a version control system as a sort of “time machine”.
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SVN (Subversion) Access Control with Apache and mod_authz_svn

I just wrote guide, howto install SVN (Subversion) Server on Fedora, CentOS and Red Hat (RHEL). No I decided to write more information about SVN Access Control. This guide works if you have installed Apache, Subversion (SVN) and mod_dav_svn on any Linux system, like Ubuntu, Debian, Arch, Gentoo, not only Fedora, CentOS or Red Hat (RHEL). Setup SVN (Subversion) Access Control with Apache and mod_authz_svn 1. Change root user su - ## OR ## sudo -i 2.
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Show Linux Version, Distribution (Distro), System Information

This is quick guide howto show Linux version, howto show Linux distributin (distro) info, howto show Linux System information, kernel version and kernel information on command line. Show Linux Version Linux version information can be checked using the following commands: cat /proc/version Another way to check Linux Version information is following: dmesg | grep "Linux version" Example output: Linux version 4.11.10-300.fc26.x86_64 ([email protected]) (gcc version 7.1.1 20170622 (Red Hat 7.1.1-3) (GCC) ) #1 SMP Wed Jul 12 17:05:39 UTC 2017 Show Linux Distribution/Distro information Use lsb_release command to show Linux distribution information: lsb_release -a Example output:
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Linux Encrypt Files/Decrypt Files – GPG Interactive/Non Interactive Modes

GNU Privacy Guard (GnuPG or GPG) is a free software alternative to the PGP suite of cryptographic software. This is quick guide, howto Encrypt and Decrypt files on Linux with password using GPG. This guide deals with both the interactive mode and the non interactive mode. Interactive mode is useful when the purpose is encrypt some files on the command line. Non interactive mode is useful when the purpose is encrypt files using scripts.
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Fedora 14 Install Guide (Live CD/Live USB) – Windows Dual Boot

This is Fedora 14 Install Guide with screenshots using Live CD or Live USB and Dual Booting with Windows. Fedora 14 Installation is also possible with using Fedora NetInstall (Net Install) with gPXE and BFO (boot.fedoraproject.org). Read more info about Fedora 14 features. If the aim is upgrade to Fedora 14, then check Upgrade Fedora 13 to Fedora 14 guide.

  1. Before Fedora 14 Installation 1.1 Download Fedora 14 LiveCD Image Download Fedora 14 here.
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Upgrade Fedora 13 to Fedora 14 with Preupgrade – Screenshots

This is guide, howto upgrade Fedora 13 to Fedora 14 with Preupgrade, which download needed packages from the server and then just reboot to installer and after install boot the new system. It’s important backup your important files before upgrading. Read more info about Fedora 14 features. If the aim is to update older versions of Fedora to Fedora 14, then each version have to be updated step by step:
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Zend Framework on Fedora 18/17, CentOS/Red Hat (RHEL) 6.4/5.9

This is quick guide, howto install Zend Framework (ZF) 1.12.3 on Fedora 18/17/16/15, CentOS 6.4/6.3/6.2/6.1/6/5.9 and Red Hat (RHEL) 6.4/6.3/6.2/6.1/6/5.9. This guide also works with older Fedora releases, like Fedora 13/12/11 and also with older CentOS/Red Hat RHEL 5 releases. I use Remi repository here because it’s updated more frequently than example Fedora’s own repositories. What is Zend Framework? Zend Framework is a simple, straightforward, open-source software framework for PHP 5 designed to eliminate the tedious details of coding and let you focus on the big picture.
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Fedora 14 nVidia Drivers Install Guide (disable nouveau driver)

Looking Fedora 22/21 nVidia Drivers Install Guide? This is guide, howto install nVidia proprietary drivers on Fedora 14 and disable Nouveau driver. I write this guide about two weeks ago, but I Delayed the publication of this guide, because of pyxf86config bug, which cause following livna-config-display errors on boot: *Checking for module nvidia.ko: [ OK ] Enabling the nvidia driver: Traceback (most recent call last): File “/usr/sbin/nvidia-config-display”, line 28, in import livnaConfigDisplay.
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NetBeans 7.4 on Fedora 20/19, CentOS/RHEL 6.5/5.10

NetBeans 7.4 is released and this is guide with screenshots, howto install NetBeans 7.4 on Fedora 20/19/18/17/16/15, CentOS 6.5/5.10 and Red Hat (RHEL) 6.5/5.10. What is NetBeans? The NetBeans IDE (integrated development environment) is available for Windows, Mac, Linux, and Solaris. The NetBeans project consists of an open-source IDE and an application platform that enable developers to rapidly create web, enterprise, desktop, and mobile applications using the Java platform, as well as JavaFX, PHP, JavaScript and Ajax, Ruby and Ruby on Rails, Groovy and Grails, and C/C++.
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Quit Bash Shell Without Saving Bash History (5 Methods)

Sometimes it is very useful to delete / remove Bash history partially or completely when log out. Here is my favourite methods howto log out / quit / exit Bash shell without saving Bash history. Remove Only Current Session Bash History and Leave Older History Untouched 1. Quit Bash Shell Without Saving History: Unset HISTFILE unset HISTFILE && exit 2. Quit Bash Shell Without Saving History: Kill Console kill -9 $$ Remove/Delete Bash History Completely 3.
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Linux: Get IP / IPv6 (internal/external) on Command Line/Shell

This is quick tip, howto get internal IP address and external IP address on Linux Shell / Command Line. This guide also show, howto make useful Bash functions to get IP addresses quickly. Note: All functions could be named as you wish and to make functions permanent, add functions to ~/.bashrc or /etc/bashrc. Also all awk commands should work also with gawk and nawk.

  1. Get Internal IP Address(es) on Linux Shell / Command Line 1.
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