Linux8 min read
Managing services with systemd
Starting, stopping, and debugging services with systemctl. Writing basic unit files and understanding targets.
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Linux9 min read
SSH hardening: securing remote access
Practical steps to lock down SSH on your Linux server. Key-based auth, disabling root login, and fail2ban basics.
Linux10 min read
grep, sed, and awk: the Linux text processing trio
Finding, replacing, and transforming text from the command line. Practical examples for each tool.
Linux6 min read
Understanding the Linux filesystem hierarchy
Where things live on a Linux system and why. A practical guide to the directory layout.
Linux7 min read
Cron jobs: scheduling tasks on Linux
How cron works, writing crontab entries, common pitfalls, and when to use alternatives.
Linux7 min read
Managing users and groups on Linux
Adding, modifying, and removing users. How groups work and why /etc/passwd still matters.
Linux8 min read
Linux file permissions explained
How Linux file permissions work, what chmod numbers actually mean, and when to use chown vs chgrp.