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Resources: Module 02 — Linux and Shell


Books

Title Notes
The Linux Command Line (William Shotts) Free online at linuxcommand.org; comprehensive bash and Linux fundamentals
Linux Bible (Christopher Negus) Reference-style coverage of administration topics

Free Online Resources

Resource URL Notes
Linux Command Line (free book) https://linuxcommand.org/tlcl.php The best free Linux command line book
Bash Reference Manual https://www.gnu.org/software/bash/manual/bash.html Official bash documentation
ShellCheck https://www.shellcheck.net/ Online bash script linter; catches common mistakes
Explain Shell https://explainshell.com/ Interactive shell command explainer
systemd Documentation https://systemd.io/ Official systemd docs
crontab.guru https://crontab.guru/ Interactive cron expression editor

Practice Environments

Resource URL Notes
OverTheWire: Bandit https://overthewire.org/wargames/bandit/ Linux command-line puzzles for practice
Linux Survival https://linuxsurvival.com/ Browser-based interactive Linux tutorial