Linux Administration Masterclass
Comprehensive resource for mastering the Command Line Interface (CLI) and System Administration.
Introduction
Linux basics, learning goals, and best practices.
Filesystem Basics
Hierarchy standard, navigation, and file types.
Users & Groups
User management, /etc/passwd, and sudo access.
Permissions
Read/Write/Execute bits, chown, and chmod.
Process Mgmt
PID, top/htop, killing processes, and priority.
Systemd Services
Start/Stop services, enable on boot, logs.
Package Mgmt
APT, YUM/DNF repositories and software installation.
Networking
IP addressing, routing, ports, and DNS tools.
Shell Scripting
Bash scripting basics, loops, and variables.
SSH & Remote
Secure Shell keys, config hardening, and scp.
Storage & LVM
Disks, partitions, mkfs, mount, and LVM.
Logs & Audit
System logs, journalctl, and log rotation.
Security/FW
Firewalls (UFW/IPTables) and best practices.
Text Processing
Grep, Sed, Awk, Cut, and processing pipelines.
Archives
Tar, Gzip, Zip, and Rsync for backups.
Environment
Variables, PATH, aliases, and .bashrc.
Git Basics
Version control essentials for admins.
Troubleshooting
Diagnostic workflows and rescue modes.
Performance
CPU, Memory, and IO bottleneck analysis.
Containers
Docker, Podman, and image management.
HTTP Tools
Curl, Wget, and web server diagnostics.
DNS Tools
Dig, Nslookup, and resolver configuration.
Time & NTP
Timedatectl, zones, and synchronization.
Regex
Regular expressions for grep and sed.
Kernel
Modules (lsmod) and uname info.
Editors
Vim, Nano, and file editing.
SELinux/AppArmor
Mandatory Access Control security.
FS Tools
Fsck, resize2fs, and maintenance.
System Info
Hardware specs and OS release info.
Linux Knowledge Base
Search or browse categorized commands.
student@linux-vm: ~ (bash)
Welcome to Cloud-with-Sai Linux Lab v2.0
Type 'help' to see available commands. This is a fully interactive simulation.
student@linux-vm:~$