UNIX and Linux System Administration Handbook

I've read most of the recommended books, but as far as what I think has delivered immediate real value, I'm going to go with: 1) Clean Code 2) The Phoenix Project 3) UNIX and Linux System Administration Handbook I'm sure #2 will be something folks want to fight over shrug. If you want to sidestep years of headache it's a must-read though.

>UNIX and Linux System Administration Handbook. That's a great book. I've read parts of both the Unix and later Linux versions. Edit: It also reminded me of the O'Reilly book Unix Power Tools - another classic. I had bought it early on and read almost the whole thing. Both it and the Handbook are quite thick, too.