1. Mac useful commands

ls  # list files
ls -a # list files including .gitignore, _book, etc

1.1. kill port

macOS:

ps aux | grep node
lsof -i:3000
kill -9 <previous processId>

windows:

netstat -a -o -n
taskkill /F /PID <previous processId>

1.2. npm commands

npm init
npm install [-g] <packageName> [--save-dev]
npm start
npm t/test/tst
npm version major/minor/patch

yarn init
yarn add <packageName> [--dev]

1.2.1. npm-check-updates

npm install -g npm-check-updates
ncu      # list
ncu -u   # update package version

1.2.2. yarn

yarn config set registry https://registry.npm.taobao.org

yarn add <packageName> [--dev]   # will automatically save package to devDependencies
yarn global add <packageName>
yarn eslint --init

# use yarn script instead npm run script
yarn dev

# upgrade all dependencies
yarn upgrade-interactive

yarn list --depth=0

1.2.3. nvm

curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.6/install.sh | bash    # install
nvm --version
nvm ls-remote  # 查看所有node版本
nvm use v6.10.2  # 切换node版本
nvm alias default v6.10.2  # 将此版本设为默认

1.2.4. File operation

mkdir <folderName>
touch <newFile.js>
cat <newFile.js>  # review file content

1.2.5. No access

sudo chown -R $USER /usr/lib/node_modules