With the release of the first beta version of RHEL-8, and more Linux trainings coming up in the coming months, I've decided to start writing some educational documentation for Linux System Administration on modern versions of CentOS, RHEL, Debian and Ubuntu. The plan is to do this as an Open-Source project and modern open-source methodologies.
The book is begin written using reStructuredText (just like this blog), to be processed into webpages and PDF documents by Sphinx.
To check out the current status (which is still quite limited, as I started this project 2 days ago), see the latest rendered version at https://linuxsysadminbook.sigio.nl/
Currently the source is hosted in a private repository on Bitbucket, but if the project gets a bit more mature, it will most likely be moved to either a public Bitbucket repository, or more likely a public github repository.