Academic
Structured learning paths and exam-focused Linux study tracks.
SELinux and AppArmor for beginners
Understand what SELinux and AppArmor do, how they differ, and how to troubleshoot real denials safely on Debian,...
Selecting Linux distributions for learning and work in 2026
A practical guide for entry-level technicians to choose Debian, Ubuntu, Fedora, or RHEL based on support windows,...
Scheduled tasks with cron anacron and systemd timers
Learn when to use cron, anacron, or systemd timers, how to avoid missed or duplicate jobs, and how to validate...
Regex basics with grep sed and awk
Learn practical regex patterns for grep, sed, and awk, with safe workflows for searching logs, editing configs, and...
Process text data with cut sort uniq tr and wc
Learn practical Linux text-processing pipelines with cut, sort, uniq, tr, and wc, including safe parsing patterns and...
Process management with ps top kill nice and systemd
Learn a practical Linux process workflow with ps, top, kill, nice, and systemd, including safe production handling and...
Practical Linux troubleshooting methodology and case studies
Learn a step-by-step Linux troubleshooting method with real incident case studies, command-driven verification, and...
Pipes redirection and streams in Linux
Learn how stdin, stdout, stderr, pipes, and redirection work in Linux, with practical command patterns that prevent...
Paths globbing and shell expansion
Understand how Bash expands paths, globs, and variables before commands run, with safe scripting patterns and...
Partitions filesystems and mounts ext4 XFS and Btrfs
Learn how partitions, filesystems, and mount points fit together, then choose ext4, XFS, or Btrfs with practical...
PAM basics authentication policy and account locking
Learn how PAM modules enforce authentication policy and account lockout safely, including pam_faillock design,...
Package management with apt dnf rpm and repositories
Learn how apt, dnf, and rpm work with trusted repositories on Debian, Ubuntu, Fedora, and RHEL, including safe update...