Ubuntu Linux Unleashed 2021 Edition
Matthew Helmke
Mastering Linux Network Administration
Jay LaCroix
Cross-Site Scripting Attacks: Classification, Attack, and Countermeasures
B. B. Gupta and Pooja Chaudhary
Cloud Attack Vectors
Morey J. Haber & Brian Chappell & Christopher Hills
Bash Idioms: Write Powerful, Flexible, Readable Shell Scripts
Carl Albing & J P Vossen