Free Course
Practical Linux Series
A structured, practical Linux course for sysadmins and DevOps engineers. Each chapter is a standalone, indexable page with real commands, enterprise scenarios, and hands-on labs.
Introduction to Linux
Kernel, shell, history, distributions, and basic commands.
Linux Filesystem & Essential Commands
Directory tree, navigation, file operations, and redirection.
Linux Permissions & Ownership
chmod, chown, umask, SUID, SGID, sticky bit, and ACLs.
Linux Users & Groups Administration
useradd, usermod, passwd, sudo, and account security.
Package Management & Text Processing
dnf/apt/rpm packages plus grep, sed, awk, and pipelines.
Processes, Signals & systemd
ps, kill, job control, systemctl, and journalctl.
Disks, Partitions & LVM
Device naming, partitioning, filesystems, and LVM.
Linux Networking Fundamentals
IP addressing, interfaces, routing, DNS, and firewalls.
Persistent Mounts & Storage Operations
fstab by UUID, mount options, swap, NFS, automount, and troubleshooting.
Linux Shell Scripting
Variables, loops, functions, cron, and practical script patterns.