Module 2: Linux Commands

Module 2: Linux Commands

Week 1: Fundamentals

Category	Commands / Topics	Key Flags / Notes	Exam Expected?	Resources
Directory Structure	/, /etc, /home, /var, /tmp, /bin, /proc	Know what each system dir is for	Yes	week1_fundamentals
Navigation	pwd, cd, ls	-lrt (sort by time), -lrth (human sizes)	Yes	week1_fundamentals
File Operations	touch, mkdir, cp, mv, rm	rm -rf (caution), cp -r for directories	Yes	week1_fundamentals
Viewing Files	cat, less, head, tail	tail -f for live logs, head -n 20	Yes	week1_fundamentals
Text Editing	nano	Ctrl+O save, Ctrl+X exit, Ctrl+K cut line	Yes	week1_fundamentals
Permissions	chmod	755 (rwxr-xr-x), 644 (rw-r–r–), +x execute	Yes	week1_fundamentals
Searching	find, grep	find . -name “*.txt”, grep -r “text” /path	Yes	week1_fundamentals
Pipes & Redirection	Pipe: | Redirect: >  »	ls -la | grep “.txt” echo “hi” > file.txt	Yes	week1_fundamentals

Mac Setup (Docker)

Mac users practice SSH & SCP using a Docker container instead of WSL. Full guide: week2_mac_ssh_scp_howto.md

Week 2: System & Remote

Category	Commands / Topics	Key Flags / Notes	Exam Expected?	Resources
Process Management	ps aux, top, kill	kill -9 force kill, top for live view	Yes	week2_system_admin
Users & Sudo	sudo, passwd	sudo as root, passwd to change pw	Yes	week2_system_admin
System Info	df -h, du -sh, free -h	df = disk free, du = dir size, free = RAM	Yes	week2_system_admin
Archives	tar -czf, tar -xzf	-c create, -x extract, -z gzip, -f filename	Yes	week2_system_admin
Package Management	apt update, apt install	Always apt update before install	Yes	week2_system_admin
SSH	ssh, ssh-keygen, ssh-copy-id	ssh user@host, keygen for passwordless login	Yes	week2_system_admin · Mac howto
File Transfer	scp	scp file.txt user@host:/remote/path/ · SCP uses -P (uppercase) for port	Yes	week2_system_admin · Mac howto

Study Resources

#	Resource Name	Type	URL
1	Official Study Guide	Guide	link
1b	Quick Reference (cheat sheet)	Guide	link
2	YouTube: Linux for Beginners	Video	link
3	YouTube: Linux Commands	Video	link
4	YouTube: Linux Tutorial	Video	link
5	YouTube: Linux Crash Course	Video	link
6	YouTube: Linux Full Course	Video	link

Videos & Course Material

Grads: add your own video links here via PR! See Contributing.

Topic	Video	Contributed by
add topic	add YouTube link	your name

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