下载nodejs

https://nodejs.org/dist/v4.6.0/node-v4.6.0-linux-x64.tar.gz

解压

tar -zxvf node-v4.6.0-linux-x64.tar.gz

移动到/opt/下

mv node-v4.6.0-linux-x64 /opt/

创建链接

ln -s /opt/node-v4.6.0-linux-x64/bin/node /use/local/bin/node

ubuntu安装nodejs