ubuntu桌面版开启root用户自动登陆

ubuntu22.04桌面版默认不支持root用户登陆，测试环境每次都要敲个sudo，实在麻烦

先给root用户设置密码

1	sudo passwd root

将下面两个文件/etc/pam.d/gdm-password和/etc/pam.d/gdm-autologin中的一行代码

1	auth required pam_succeed_if.so user != root quiet_success

修改/root/.profile文件

1 2	- mesg n 2＞ /dev/null \|\| true + tty -s && mesg n \|\| true

修改/etc/gdm3/custom.conf，没有这个文件就在设置里开启自动登录，或者自己创建

# GDM configuration storage
#
# See /usr/share/gdm/gdm.schemas for a list of available options.

[daemon]
AutomaticLoginEnable=true
- AutomaticLogin=pblood
+ AutomaticLogin=root

# Uncomment the line below to force the login screen to use Xorg
#WaylandEnable=false

# Enabling automatic login

# Enabling timed login
#  TimedLoginEnable = true
#  TimedLogin = user1
#  TimedLoginDelay = 10

[security]

[xdmcp]

[chooser]

[debug]
# Uncomment the line below to turn on debugging
# More verbose logs
# Additionally lets the X server dump core if it crashes
#Enable=true