设置source
# for Node.js v4
curl -sL https://deb.nodesource.com/setup_4.x | sudo -E bash -
# OR for Node.js v5
curl -sL https://deb.nodesource.com/setup_5.x | sudo -E bash -
# OR for Node.js v6
curl -sL https://deb.nodesource.com/setup_6.x | sudo -E bash -
# OR for Node.js v7
curl -sL https://deb.nodesource.com/setup_7.x | sudo -E bash -
安装nodejs
sudo apt-get install -y nodejs
更新, 如果需要更新版本. 先删掉当前版本再执行1,2操作
sudo apt-get purge nodejs npm