BIND DNS Administration Reference

Linux Server Hacks, Volume Two: Tips & Tools for Connecting, Monitoring, and Troubleshooting

Automating Linux and Unix System Administration (Expert's Voice in Linux)

Unix And Linux System Administration Handbook: Mastering Networking, Security, Cloud, Performance, And Devops

What You Need To Know: When You Can't Find Your UNIX System Administrator

Python for Unix and Linux System Administration

Linux in Small Business: A Practical User's Guide

Linux Cookbook: Practical Advice for Linux System Administrators

UNIX Administration (Internet and Communications)

termcap & terminfo (O'Reilly Nutshell)