vim /etc/pam.d/su
取消注释
Uncomment this if you want wheel members to be able to
su without a password
root@G480:~# groupadd wheel
root@G480:~# usermod -G wheel username
vim /etc/pam.d/su
取消注释
root@G480:~# groupadd wheel
root@G480:~# usermod -G wheel username