Mac终端Error: The following direct

Homebrew安装应用，权限报错

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

尝试回收权限

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

然后就可以正常安装啦