默认是不允许的,我是参考了这篇文章,最后是可行的。
# 给root加密码 passwd # 修改自动登录配置文件 sed -i.bak 's/^auth.*required.*pam_succeed_if.so user.*!=.*root.*quiet_success/#auth required pam_succeed_if.so user != root quiet_success/g' /etc/pam.d/gdm-autologin sed -i.bak 's/^auth.*required.*pam_succeed_if.so user.*!=.*root.*quiet_success/#auth required pam_succeed_if.so user != root quiet_success/g' /etc/pam.d/gdm-password echo -e "greeter-show-manual-login=true #手工输入登陆系统的用户名和密码\nallow-guest=false #不允许guest登录(可选)" >> /usr/share/lightdm/lightdm.conf.d/50-ubuntu.conf sed -i.bak 's/^\(mesg n 2.*\)/#\1/g' /root/.profile echo -e "tty -s && mesg n" >> /root/.profile
再修改一下这个 /etc/gdm3/custom.conf