Linux Administration Reference

Linux system administration fundamentals across 22 topics — from file operations through kernel internals and mandatory access control.

Core

Topic Description

Files

File operations, find, links

Permissions

chmod, chown, ACLs, SUID/SGID/sticky

Processes

Process management, signals, priorities

Users

User/group management, sudo

Shell Advanced

Advanced shell patterns

Package Managers

pacman, apt, dnf patterns

Services & Scheduling

Topic Description

systemd

Units, services, targets

journalctl

Journal inspection, filtering, maintenance

Cron

crontab, anacron, systemd timers

Boot & Kernel

Topic Description

Boot

Boot process, targets, rescue mode, initramfs

GRUB

GRUB bootloader configuration and recovery

Kernel

Kernel info, sysctl, boot parameters

Modules

Kernel module management, DKMS

Storage

Topic Description

Disk

Partitions, filesystems, mount

LVM

Logical Volume Manager

RAID

Software RAID with mdadm

Btrfs

Btrfs snapshots, subvolumes

NFS

NFS server/client, autofs, Kerberos

Security

Topic Description

SELinux

SELinux modes, contexts, booleans

AppArmor

AppArmor profiles and management

Isolation & Networking

Topic Description

cgroups

Control groups, resource limits

Namespaces

Linux namespaces, unshare, nsenter

Networking

ip, ss, nmcli, firewall-cmd, DNS tools

Desktop & Reference

Topic Description

Hyprland

Hyprland window manager

Locale & Keyboard

Locale generation, keyboard layouts, input methods, Hebrew font support

Doc Discovery

Local documentation system audit