Quick Reference

Cheatsheets

Practical command references for Linux, networking, servers, containers, databases, and more.

Cheatsheet#zsh-cheatsheet

Zsh Cheatsheet

Zsh (Z Shell) is an extended Bourne shell with many improvements, including powerful autocompletion and theming capabilities (via frameworks like Oh My Zsh). It is the default shell on macOS.

Installation

# Debian / Ubuntu
sudo apt install zsh
 
# Arch Linux
sudo pacman -S zsh
 
# macOS
brew install zsh

Basic Configuration

zsh --version             # Check version
cat /etc/shells           # List available shells
chsh -s $(which zsh)      # Change default shell to Zsh (requires logout)
source ~/.zshrc           # Reload configuration

Oh My Zsh makes managing Zsh configuration, themes, and plugins much easier.

Installation

sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"

Configuration (~/.zshrc)

# Change theme
ZSH_THEME="robbyrussell"  # e.g., "agnoster", "powerlevel10k/powerlevel10k"
 
# Enable plugins
plugins=(
  git
  docker
  zsh-autosuggestions
  zsh-syntax-highlighting
)

Zsh Specific Features

Advanced Globbing

ls **/*.txt          # Recursive search for .txt files
ls *(.)              # Match only regular files
ls *(/)              # Match only directories
ls *(@)              # Match only symlinks
ls *(m-1)            # Match files modified in the last 1 day
ls *(L+10M)          # Match files larger than 10MB

Path Replacement (Quick cd)

cd /var/log/apache2
cd apache2 nginx     # Replaces 'apache2' with 'nginx' in the path, moving to /var/log/nginx

History Expansion

!!                   # Run the last command
sudo !!              # Run the last command with sudo
!$                   # The last argument of the previous command
!*                   # All arguments of the previous command