If you want to install only security-related updates to your CentOS Linux installation using the
yum command, it looks like the
yum-plugin-security plugin might be a good option. (I’m having a few problems with it at the moment, so I can’t say that this is the absolute solution.) I found it on this page and this page.
There’s just one person behind this website; if this article was helpful (or interesting), I’d appreciate it if you’d share it. Thanks, Al.