How To Downgrade RPM Package Using YUM

on April 1 | in Linux | by Sohail Riaz | with No Comments

In this howto I will describe how to Downgrade a RPM Package Using YUM. Yum came with a plugin named yum-allowdowngrade which allow you to downgrade any existing install RPM to older version. This requirement came from one of my client server that it requires to downgrade PHP version from 5.3.8 to 5.2.17.

1) Check Already Installed RPM and Required RPM

Following command will check which rpm version is installed.

rpm -qa | grep php

The next command will show you all available version using yum. Be noted I am using atomic repository for my PHP upgrade and downgrade. But you can do this with any rpm hence yum provide you with lower version of rpm package. How to add atomic repository kindly see my following post

http://www.sohailriaz.com/how-to-update-php-on-servers-centosfedorarhel/

yum list | grep php | grep atomic

2) Install YUM Plugin

Issue following command to install yum-allowdowngrade plugin

yum -y install yum-allowdowngrade

3) Downgrade RPM Install

First you should be sure what rpm’s you are going to downgrade. For my list I will using already install PHP rpm package name with downgrade argument, which let yum to automatically use the lower version to install and remove the current version of PHP.

yum downgrade php-dba php-soap php-ldap php-mysql php-mcrypt php-common php-cli php-gd php-odbc php-xmlrpc php-snmp php-bcmath php-imap- php-devel php-pdo php php-pgsql php-pgsql php-mbstring php-xml

The above command detect the lower version 5.2.17 at itself and give me option to downgrade the php version to 5.2.17. By giving y to start the installation, it removes the current php version, save the configuration files and install the older version of php 5.2.17. Which was than verified using following commands

rpm -qa | grep php

shows install php rpm with version, additionally you can use php command with version option

php –version

If you have any question please comment.

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I am a First Red Hat Certified Architect - RHCA (ID # 110-082-666) from Pakistan with over 14 years industry experience in several disciplines including LINUX/UNIX System Administration, Virtualization, Network, Storage, Load Balances, HA Clusters and High Performance Computing.

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