How to fix npm ERR! code E404 npm ERR! 404 Not Found - npx: command not found in npm | DevErrors

How to fix npm ERR! code E404 npm ERR! 404 Not Found - npx: command not found in npm | DevErrors

How to fix "npm ERR! code E404 npm ERR! 404 Not Found - npx: command not found"

1Check npm version

Verify npm version (needs 5.2.0+):

bash

npm --version

If below 5.2.0, upgrade:

bash

npm install -g npm@latest

2Install npx manually if needed

If npx is still missing:

bash

npm install -g npx

npx --version

3Add npm to PATH

Get npm's bin directory and add to PATH:

bash

# Find npm prefix
npm config get prefix

# Add to PATH (Linux/macOS)
# Add this to ~/.bashrc or ~/.zshrc:
export PATH=$(npm config get prefix)/bin:$PATH

source ~/.bashrc

Windows: Add the npm path to System Environment Variables.

4Fix nvm setup

If using nvm, ensure proper shell integration:

bash

# Add to ~/.bashrc or ~/.zshrc:
export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"

# Reload
source ~/.bashrc

# Test
npx --version

5Reinstall Node.js if needed

If still not working, reinstall Node.js:

macOS (Homebrew):

bash

brew uninstall node
brew install node

Windows/Linux: Download installer from nodejs.org and run.

Verify:

bash

node --version
npm --version
npx --version