Linux: Introduce to Beginners Guide UNIX operating system, Linux System & Network administration, cybersecurity, IT

UNIX System Administration

termcap and terminfo: Help for Unix System Administrators

Managing NFS and NIS: Help for Unix System Administrators

FreeBSD Mastery: Specialty Filesystems (It Mastery)

Practical UNIX and Internet Security: Securing Solaris, Mac OS X, Linux & Free BSD

Unix System V Print Service Administration (Prentice Hall Open Systems Library)

Python for Unix and Linux System Administration

DNSSEC Mastery (IT Mastery)

Bind 9 DNS Administration Reference Book