这个命令不是很常用,虽然简单,但是时间长了还是记不住具体的参数,所以就用赖笔头记下来吧。
参考链接 http://www.server-world.info/en/note?os=Fedora_23&p=initial_conf
[1] Add a new user account.
[root@localhost ~]# useradd fedora
[root@localhost ~]# passwd fedora
Changing password for user fedora.
New UNIX password:
set password
Retype new UNIX password:
confirm
passwd: all authentication tokens updated successfully.
[root@localhost ~]# exit
logout
[2] Try to switch to a user that was added above.
localhost login: fedora
input user name
password:
password
[fedora@localhost ~]$ su -
switch to root
Password:
root password
[root@localhost ~]#
just switched to root
[3] Make a user (it’s [fedora] in this example) be only a user who can switch to root as an administration user.
[root@localhost ~]# usermod -G wheel fedora
[root@localhost ~]# vi /etc/pam.d/su
%PAM-1.0
auth sufficient pam_rootok.so
Uncomment the following line to implicitly trust users in the “wheel” group.
auth sufficient pam_wheel.so trust use_uid
Uncomment the following line to require a user to be in the “wheel” group.
uncomment the following line
auth required pam_wheel.so use_uid
auth substack system-auth
auth include postlogin
account sufficient pam_succeed_if.so uid = 0 use_uid quiet
account include system-auth
password include system-auth
session include system-auth
session include postlogin
session optional pam_xauth.so