When you manage multiple Linux servers, you generally try and keep them all at the same patch level, otherwise you find can find your self dealing with problems unique to one or two servers because they have newer or order software than the others.
If your distribution of choice uses YUM, there is a simple to use plug-in that you will find useful, versionlock.
Versionlock allows you specify what version of a package should be installed. You can find out more about it in the baseurl.org yum wiki.
Installing it is as simple as
yum install yum-plugin-versionlock
The next step is to use the versionlock plug-in to create its file of package versions.
yum versionlock \*
Now, if you try to install updates they will be rejected. So how do you update? Update the package version in the version list file, /etc/yum/pluginconf.d/versionlock.list, an then run yum upgrade.