问题
i'm using mac os x and i was trying to run shutdown command but it says i'm not a superuser.
However, i could run ifconfig without being super user.
Both command are in /sbin.
And my PATH environment variable include /sbin ( is that why i can run ifconfig..?).
From what i have found, it says that
/sbin
for scripts with superuser (root) privileges required.
But i'm not quite sure about this explanation..
I'd appreciate all your help..
回答1:
it means that you must be superuser (the owner of the machine) to run those commands, for example:
sudo shutdown
it will ask for a password, you must type the main user's password (the typing will not print out the password's chars) and press enter so you can confirm you are the super user.
sudo allows a permitted user to execute a command as the superuser or another user, as specified in the sudoers file. more: http://ss64.com/bash/sudo.html
来源：https://stackoverflow.com/questions/24015023/how-does-permission-works-to-run-sbin-command-on-mac