Centos – Downgrade centos version

centos

I currently have CentOS 5.10 installed in my server.

Is it possible to downgrade it to CentOS 5.5 with out re installing ?

Best Answer

I don't have a CentOS test box at hand, but the procedure is documented on Red Hat's support portal https://access.redhat.com/solutions/186763

Ensure that you have a yum repo for that old release configured. Check http://mirror.centos.org/centos/5.5/readme to see it is considered a bad idea to run CentOS 5.5 and where to find such repo's.
Install the correct old kernel for that old minor release,

yum install kernel-<version>
reboot to that kernel version.
And than run a yum downgrade to the release package you want, something like: yum downgrade centos-release-5-5

No personal experience if doing the above will work as expected...

Related Solutions

Centos – Adding a directory to $PATH in CentOS

It's not a good idea to edit /etc/profile for things like this, because you'll lose all your changes whenever CentOS publishes an update for this file. This is exactly what /etc/profile.d is for:

echo 'pathmunge /usr/lib/ruby-enterprise/bin' > /etc/profile.d/ree.sh
chmod +x /etc/profile.d/ree.sh

Log back in and enjoy your (safely) updated $PATH:

echo $PATH
/usr/lib/ruby-enterprise/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

which ruby
/usr/lib/ruby-enterprise/bin/ruby

Instead of logging back in, you could reload the profile:

. /etc/profile

This will update the $PATH variable.

Centos – Upgrade Perl on CentOS 5.5 to version 5.10+

While CentOS 6 will have Perl 5.10.* supported (see the list of included packages for Red Hat Enterprise Linux 6), there are not many RPM sources for installing 5.10.x on CentOS 5. Your best bet will be to compile it yourself.

To do that, you can download any version from 5.3 to the latest development version (5.13) from CPAN - you can download it directly from here.

Download, extract, configure if you want to support specific features, and run make, make test, and make install. See the installation page for Perl at CPAN here for a walkthrough (You can also see a basic tutorial for installing 5.10 this way at this site).

Best Answer

Related Solutions

Centos – Adding a directory to $PATH in CentOS

Centos – Upgrade Perl on CentOS 5.5 to version 5.10+

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