永远也记不住linux环境变量，库文件，头文件...

1）安装
cp node-v4.9.1-linux-armv7l.tar.gz /usr/local/
cd /usr/local/
tar xvf node-v4.9.1-linux-armv7l.tar.gz

2）添加环境变量

export PATH=$PATH:/usr/local/node-v4.9.1-linux-armv7l/bin
export LD_LIBRARY_PATH=/usr/local/node-v4.9.1-linux-armv7l/lib:$LD_LIBRARY_PATH

添加到/etc/profile文件或者~/.bashrc文件

vi /etc/profie

export PATH=$PATH:/usr/local/node-v4.9.1-linux-armv7l/bin
export LD_LIBRARY_PATH=/usr/local/node-v4.9.1-linux-armv7l/lib:$LD_LIBRARY_PATH

source /etc/profile

vi ~/.bashrc
export PATH=$PATH:/usr/local/node-v4.9.1-linux-armv7l/bin
source ~/.bashrc

或者直接echo "export PATH=$PATH:/usr/local/node-v4.9.1-linux-armv7l/bin " >> ~/.bashrc