books by subject
UNIX & Linux Web-Server Software
Using Samba
Linux: The Complete Reference, 4th Edition (Osborne Complete Reference Series)
The Linux Web Server CD Bookshelf: WITH "Linux in a Nutshell"
Linux Server Hacks: 100 Industrial-Strength Tips and Tools
DevOps Troubleshooting: Linux Server Best Practices
Beginning Ubuntu LTS Server Administration: From Novice to Professional (Expert's Voice in Linux)
UNIX For Dummies, 5th Edition
Linux Socket Programming by Example
Linux Internet Server Visual Black Book