Linux & Command Line¶

Shell & Terminal¶

• terminal basics - Shells, essential commands, keyboard shortcuts, getting Linux
• text editors - nano and vim: modes, shortcuts, navigation

Files & Filesystem¶

• filesystem hierarchy - FHS directory layout, file types, disk usage
• file operations - Create, copy, move, delete, view files and directories
• file search and grep - find, grep, locate, whereis, which
• text processing - wc, sort, uniq, cut, awk, sed, tr
• io redirection and pipes - stdin/stdout/stderr, pipes, command chaining, exit codes
• links and inodes - Hard links, symlinks, inode structure, ext4 internals
• file permissions - chmod, chown, SUID/SGID/sticky, umask, ACLs

Users & Security¶

• users and groups - User types, passwd/shadow/group, useradd, sudo, su
• linux security - DAC/MAC, namespaces, seccomp, malware types, pentesting tools
• firewall and iptables - iptables chains/targets/rules, nftables, ufw

Containers¶

• docker basics - Images, containers, volumes, Dockerfile, lifecycle, cleanup

System Administration¶

• systemd and services - systemctl, unit files, kernel modules, hardware inspection
• process management - ps, top, htop, kill, signals, process states, priority
• package management - apt, dpkg, snap, yum/dnf, rpm, winget
• cron and scheduling - crontab syntax, at, system time, NTP
• disks and filesystems - Partitions, ext4, mounting, fstab, LVM, LUKS encryption
• logging and journald - syslog, rsyslog, journalctl, logrotate, auditd
• monitoring and performance - Memory, disk I/O, network, load average, cgroups

Networking & Remote¶

• ssh remote access - SSH keys, config, tunnels, SCP, security hardening

Scripting¶

• bash scripting - Variables, conditionals, loops, functions, debugging
• python and node cli - Python/pip/venv and Node.js/npm from CLI

Architecture & Internals¶

• linux kernel and boot - Kernel, modules, boot sequence, GRUB, init systems, memory
• linux os structure - Kernel vs user space, sockets, device files, security model

Windows Interop¶

• wsl - WSL installation, file interop, networking, configuration
• powershell basics - Cmdlets, object pipelines, variables, scripts

Additional References¶

• disk data recovery - Recovering failed or large (16 TB+) drives at the block level: imaging, partition/GPT repair
• ffmpeg encoding - CLI media encoder