Practitioner Overview

20 labs · Ubuntu 22.04 · Docker-verified

Automate tasks and administer systems confidently. Prerequisites: Linux Foundations.

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Labs

#	Lab	Topics
01	Shell Scripting — Variables & Conditionals	variables, quoting, if/elif/else, case
02	Shell Scripting — Loops	for, while, until, break, continue
03	Shell Scripting — Functions & Arguments	functions, local vars, getopts, $@
04	Shell Scripting — Error Handling	set -euo pipefail, trap, exit codes
05	Shell Scripting — Automation	backup scripts, log rotator, report gen
06	Process Management & Signals	kill, pkill, pgrep, nice, renice, zombie
07	Background Jobs & nohup	&, jobs, fg/bg, nohup, disown, wait
08	Cron Jobs & Task Scheduling	crontab, @reboot, /etc/cron.d/, at
09	systemd — Service Management	systemctl, unit files, journalctl
10	System Resource Monitoring	top, free, vmstat, iostat, uptime
11	Networking — ip, ss, netstat	ip addr/route, ss -tlnp, /proc/net/
12	Networking — curl, wget & HTTP	curl flags, wget, HTTP codes, REST
13	Firewall with ufw	ufw rules, default policies, logging
14	Firewall with iptables	iptables chains, rules, ACCEPT/DROP
15	Network Diagnostics	ping, traceroute, dig, nc, mtr
16	SSH — Key Auth & Config	ssh-keygen ed25519, ~/.ssh/config, scp
17	Log Management — journalctl	journalctl, logger, logrotate, rsyslog
18	System Monitoring & Performance	vmstat, iostat, sar, /proc/loadavg
19	Text Processing — grep, awk, sed	regex, field processing, in-place edit
20	Capstone — Server Admin Workflow	full sysadmin workflow end-to-end

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Start here → Lab 01: Shell Scripting — Variables & Conditionals