Getting a copy of "The Debian Administrator's Handbook" also helps support Raphaël Hertzog and Roland Mas keep doing good work.
I purchased a recent copy of the book (covering Debian 8), and while there are things I'd like more details about, I find it a good resource to have on hand.
I purchased a recent copy of the book (covering Debian 8), and while there are things I'd like more details about, I find it a good resource to have on hand.