假定想添加的环境变量路径为:/opt/my-tools/Android-sdk/tools
1 进入用户的根目录
cd $HOME 或 cd ~
2 然后打开.bashrc若不存在则新建.bashrc文件
vim .bashrc
3 在.bashrc页面最后加上想要加的路径
export PATH=$PATH:/opt/my-tools/android-sdk/tools
4 最后执行
source ~/.bashrc
5.Reference:
http://blog.youkuaiyun.com/lzx_bupt/article/details/5642690
http://blog.youkuaiyun.com/secondjanuary/article/details/9206151