Command Not Found Error

Use which or where to check if the command exists anywhere.

# Linux/macOS: check if command is available
which node
which npm

# Windows
where node
where npm

# If not found, install it
# Node.js: https://nodejs.org

Add common binary directories to your PATH.

# Linux/macOS: add to ~/.bashrc or ~/.zshrc
export PATH="$PATH:/usr/local/bin"
export PATH="$PATH:$HOME/.npm-global/bin"
export PATH="$PATH:./node_modules/.bin"

# Windows: add to system PATH via GUI
# System Properties → Environment Variables → PATH
# Add: C:\Program Files\nodejs\

npx runs Node.js packages without installing them globally.

# Instead of installing globally
npm install -g create-react-app
create-react-app my-app

# Use npx instead (no global install)
npx create-react-app my-app

# Other examples
npx prettier --write .
npx eslint .
npx tsc --init