目录

[TOC]

1.先设置一下密码

sudo passwd root

2.编辑/etc/pam.d/gdm-autologin

vim /etc/pam.d/gdm-autologin 

注释掉这行

auth   required    pam_succeed_if.so user != root quiet_success 

变成

#%PAM-1.0
auth    requisite       pam_nologin.so
#auth   required    pam_succeed_if.so user != root quiet_success                                                                
auth    optional    pam_gdm.so
auth    optional    pam_gnome_keyring.s
...

3.编辑vim /etc/pam.d/gdm-password

vim /etc/pam.d/gdm-password

注释掉auth required pam_succeed_if.so user != root quiet_success

变成

#%PAM-1.0                                                                                                                       
auth    requisite       pam_nologin.so
#auth   required    pam_succeed_if.so user != root quiet_success
@include common-auth
auth    optional        pam_gnome_keyring.so
@include common-account
...

4.最后重启以root用户登录即可
不想重启的话执行如下命令也可。。

sudo systemctl restart systemd-logind.service