How to Use the Terminal Beyond the Basics

# Count how many JavaScript files exist in your project
find . -name "*.js" | wc -l

# Show the 10 largest files in a directory
du -sh * | sort -rh | head -10

# List all unique file extensions in your project
find . -type f | sed 's/.*\.//' | sort -u

# Write output to a file (overwrites)
echo "Hello" > output.txt

# Append output to a file
echo "World" >> output.txt

# Redirect errors to a file
npm run build 2> errors.log

# Redirect both output and errors
npm run build > build.log 2>&1

# Find all files containing "useState"
grep -r "useState" src/

# Case-insensitive search
grep -ri "error" src/

# Show line numbers
grep -rn "TODO" src/

# Show 3 lines of context around each match
grep -rn -C 3 "fetchUser" src/

# Search only specific file types
grep -rn "className" --include="*.tsx" src/

# Invert match: show lines that do NOT contain a pattern
grep -v "node_modules" file.txt

# Find all exports in TypeScript files
grep -rn "^export" --include="*.ts" src/ | grep -v "node_modules"

# Count how many times a function is called
grep -r "formatDate" src/ | wc -l

# Find all TypeScript files
find src/ -name "*.ts"

# Find all directories named "components"
find src/ -type d -name "components"

# Find files modified in the last 24 hours
find src/ -mtime -1

# Find files larger than 1MB
find . -size +1M

# Find and delete all .DS_Store files
find . -name ".DS_Store" -delete

# Find empty directories
find . -type d -empty

# Find all PNG files and list their sizes
find . -name "*.png" -exec ls -lh {} \;

# Find all test files and count lines of code
find src/ -name "*.test.ts" -exec wc -l {} +

# Set a variable for the current session
export API_URL="http://localhost:3000"

# Use it in a command
curl $API_URL/health

# See all environment variables
env

# See a specific variable
echo $PATH

# Set a variable for just one command
NODE_ENV=production npm run build

# Add to ~/.zshrc to persist across sessions
export EDITOR="code"
export PATH="$HOME/.local/bin:$PATH"

source ~/.zshrc

# Git shortcuts
alias gs="git status"
alias gc="git commit"
alias gp="git push"
alias gl="git log --oneline -20"
alias gd="git diff"

# Project shortcuts
alias dev="npm run dev"
alias build="npm run build"
alias lint="npm run lint"

# Navigation
alias ..="cd .."
alias ...="cd ../.."
alias projects="cd ~/projects"

# Create a directory and cd into it
mkcd() {
  mkdir -p "$1" && cd "$1"
}

# Kill whatever is running on a specific port
killport() {
  lsof -ti:$1 | xargs kill -9
}

# Quick git add, commit, push
gcp() {
  git add -A && git commit -m "$1" && git push
}

#!/bin/bash
# setup.sh — Set up the project for development

echo "Installing dependencies..."
npm install

echo "Setting up environment..."
cp .env.example .env.local

echo "Running database migrations..."
npx supabase db push

echo "Starting dev server..."
npm run dev

chmod +x setup.sh
./setup.sh

#!/bin/bash
# precheck.sh — Run all checks before committing

set -e  # Exit on first error

echo "Running type check..."
npm run typecheck

echo "Running linter..."
npm run lint

echo "Running build..."
npm run build

echo "All checks passed."

# Check if a command exists
if command -v docker &> /dev/null; then
  echo "Docker is installed"
else
  echo "Docker is not installed"
  exit 1
fi

# Accept arguments
echo "Deploying to $1..."  # ./deploy.sh production

# Use variables
TIMESTAMP=$(date +%Y%m%d_%H%M%S)
BACKUP_FILE="backup_$TIMESTAMP.sql"