error: could not lock config file .git/config: Permission denied/Command failed with exit 255

　　吾就安装个软件，竟然报这个错误：

error: could not lock config file .git/config: Permission denied
Error: Command failed with exit 255: git

• 解决办法

sudo chgrp -R admin /usr/local
sudo chmod -R g+w   /usr/local

执行时会报目录没权限，不必理会。