Mac使用brew安装软件缺少权限的问题

错误信息如下：

Error: The following directories are not writable by your user:
/usr/local/share/man/man8

You should change the ownership of these directories to your user.
sudo chown -R $(whoami) /usr/local/share/man/man8

And make sure that your user has write permission.
chmod u+w /usr/local/share/man/man8

解决方法：

sudo chown -R `whoami`:admin /usr/local/bin

sudo chown -R `whoami`:admin /usr/local/share