Linux & Server Cheat Sheets

awk Examples

Column-wise text processing with paste-ready one-liners.

chmod

Octal and symbolic permissions, special bits, and safe recursion.

find Command Examples

Locate files by name, type, age, or size, then act on them.

grep

Search files and pipes with the everyday flags and regex syntax.

sed Examples

Stream editing: replace, delete, insert, and in-place file edits.

zsh

History, aliases, globbing, and Oh My Zsh on the Mac default shell.

apt Commands

Install, upgrade, hold, and repair packages on Debian and Ubuntu.

DNF

Package management on Fedora and RHEL, including history undo.

pacman Commands

Arch package management with safe upgrade habits and the AUR.

curl Command

Requests, auth, downloads, debugging, and exit codes.

netstat Commands

Sockets and listening ports with netstat, ss, and Windows flags.

tcpdump Examples

Capture and filter packets with BPF syntax and pcap files.

Docker Commands

Containers, images, volumes, networks, and cleanup in daily use.

Docker Compose Commands

The compose CLI plus the compose.yaml keys that matter.

iptables Commands

List, allow, NAT, and persist rules without locking yourself out.

UFW Commands

Allow, deny, limit, and audit Ubuntu's firewall.

journalctl Commands

Read, filter, and prune systemd journal logs.

systemctl Commands

Start, enable, inspect, and repair systemd services.

SSH Commands

Connect, copy files, manage keys, and tunnel with the ssh toolchain.

tmux

Sessions, windows, panes, and copy mode with the default prefix.

OpenSSL Commands

Inspect certificates, make keys and CSRs, and convert formats.

PM2 Commands

Run Node apps with logs, cluster mode, and boot persistence.

PuTTY Commands

The Linux commands, keyboard shortcuts, and CLI options PuTTY users reach for.

rsync Commands

Copy and mirror over SSH with excludes, resume, and dry runs.