Linux & Shell

Essential Linux commands, file system navigation, permissions, process management, bash scripting, cron jobs, SSH, and becoming fluent in the terminal.

BeginnerTopics 1–10

·Filesystem Navigation
·File Operations
·Viewing Files
·File Permissions
·Searching
·Pipes & Redirection
·Environment Variables
·Package Managers
·SSH Basics
·man pages & help

Start Beginner →

IntermediateTopics 11–20

·Process Management
·Text Processing
·Archives
·Users & Groups
·Disk Usage
·Cron Jobs
·Networking
·tmux & screen
·Links (Symbolic & Hard)
·sudo & sudoers

Start Intermediate →

AdvancedTopics 21–30

·systemd & Services
·File Descriptors & /proc
·Inodes & Filesystems
·Kernel Parameters (sysctl)
·Firewall Basics (iptables)
·Performance Monitoring
·strace & ltrace
·lsof & File Handles
·Security (SELinux/AppArmor)
·chroot & Namespaces

Start Advanced →

ScriptingTopics 31–40

·Variables & Quoting
·Conditionals & Loops
·Functions
·Arrays
·String Manipulation
·Error Handling
·Argument Parsing
·Here Documents
·Script Testing
·Practical Patterns

Start Scripting →