Linux Administration Cookbook

There's more...

There is a lot more, really; check for blogs, such as CentOS (https://blog.centos.org/), and individual mailing lists for other packages and projects.

OpenSSL, for example, is a good one to keep an eye on (https://www.openssl.org/community/mailinglists.html), and I don't say that for any particular heart-health-related reason.

A big one is the kernel mailing list selection, viewable through https://lkml.org/; here, kernel news is generally broken first.