Zsh/Sh Commands

 1# Recursive globbing
 2ls **/*.txt
 3
 4# Exclude pattern
 5ls ^*.txt
 6
 7# Numeric ranges
 8ls file<1-10>.txt
 9
10# Qualifiers
11ls *(.)      # Files only
12ls *(/)      # Directories only
13ls *(.x)     # Executable files
14ls *(m-7)    # Modified in last 7 days
15ls *(Lm+100) # Larger than 100MB

 1# Array creation
 2arr=(one two three)
 3
 4# Access elements
 5echo $arr[1]  # First element (1-indexed in zsh)
 6echo $arr[-1] # Last element
 7
 8# Array slicing
 9echo $arr[2,3]
10
11# Array length
12echo $#arr

 1# Default value
 2echo ${VAR:-default}
 3
 4# Assign default
 5echo ${VAR:=default}
 6
 7# Substring
 8str="hello world"
 9echo ${str:0:5}  # "hello"
10
11# Remove pattern
12path="/usr/local/bin"
13echo ${path#*/}   # Remove shortest match from start
14echo ${path##*/}  # Remove longest match from start
15echo ${path%/*}   # Remove shortest match from end
16echo ${path%%/*}  # Remove longest match from end
17
18# Replace
19echo ${str/world/universe}

 1# Enable completions
 2autoload -Uz compinit && compinit
 3
 4# Case-insensitive completion
 5zstyle ':completion:*' matcher-list 'm:{a-z}={A-Za-z}'
 6
 7# Menu selection
 8zstyle ':completion:*' menu select
 9
10# Rehash for new commands
11rehash

 1# History search
 2Ctrl+R  # Reverse search
 3
 4# History expansion
 5!!      # Last command
 6!$      # Last argument
 7!^      # First argument
 8!*      # All arguments
 9!-2     # 2nd last command
10
11# Search history
12history | grep pattern
13
14# Execute from history
15!123    # Execute command #123

 1#!/bin/sh
 2
 3# Variables (no spaces around =)
 4VAR="value"
 5
 6# Command substitution
 7TODAY=$(date +%Y-%m-%d)
 8TODAY=`date +%Y-%m-%d`  # Old style
 9
10# Conditionals
11if [ -f "file.txt" ]; then
12    echo "File exists"
13elif [ -d "dir" ]; then
14    echo "Directory exists"
15else
16    echo "Not found"
17fi
18
19# String tests
20if [ "$VAR" = "value" ]; then
21    echo "Match"
22fi
23
24if [ -z "$VAR" ]; then
25    echo "Empty"
26fi
27
28if [ -n "$VAR" ]; then
29    echo "Not empty"
30fi
31
32# Numeric tests
33if [ "$NUM" -gt 10 ]; then
34    echo "Greater than 10"
35fi
36
37# File tests
38[ -e file ]  # Exists
39[ -f file ]  # Regular file
40[ -d dir ]   # Directory
41[ -r file ]  # Readable
42[ -w file ]  # Writable
43[ -x file ]  # Executable

 1# For loop
 2for file in *.txt; do
 3    echo "$file"
 4done
 5
 6# While loop
 7while read line; do
 8    echo "$line"
 9done < file.txt
10
11# Until loop
12count=0
13until [ $count -eq 5 ]; do
14    echo $count
15    count=$((count + 1))
16done
17
18# C-style (not POSIX)
19i=0
20while [ $i -lt 10 ]; do
21    echo $i
22    i=$((i + 1))
23done

 1# Function definition
 2my_function() {
 3    echo "Arg 1: $1"
 4    echo "Arg 2: $2"
 5    return 0
 6}
 7
 8# Call function
 9my_function arg1 arg2
10
11# Check return value
12if my_function; then
13    echo "Success"
14fi

 1# Oh My Zsh
 2export ZSH="$HOME/.oh-my-zsh"
 3ZSH_THEME="robbyrussell"
 4plugins=(git docker kubectl)
 5source $ZSH/oh-my-zsh.sh
 6
 7# Aliases
 8alias ll='ls -lah'
 9alias gs='git status'
10alias gp='git pull'
11
12# Custom prompt
13PROMPT='%F{cyan}%n@%m%f:%F{yellow}%~%f$ '
14
15# History settings
16HISTSIZE=10000
17SAVEHIST=10000
18HISTFILE=~/.zsh_history
19setopt SHARE_HISTORY
20setopt HIST_IGNORE_DUPS
21
22# Key bindings
23bindkey '^[[A' history-search-backward
24bindkey '^[[B' history-search-forward
25
26# Auto-cd
27setopt AUTO_CD
28
29# Correction
30setopt CORRECT
31setopt CORRECT_ALL

 1# Navigation
 2alias ..='cd ..'
 3alias ...='cd ../..'
 4alias ....='cd ../../..'
 5
 6# Git
 7alias g='git'
 8alias ga='git add'
 9alias gc='git commit'
10alias gco='git checkout'
11alias gd='git diff'
12alias gl='git log --oneline'
13
14# Docker
15alias d='docker'
16alias dc='docker-compose'
17alias dps='docker ps'
18alias dimg='docker images'
19
20# System
21alias update='sudo apt update && sudo apt upgrade'
22alias ports='netstat -tuln'
23alias myip='curl ifconfig.me'