修改:
sudo vi /etc/pam.d/gdm-autologin
注释行 "auth requied pam_succeed_if.so user != root quiet success"
sudo vi /etc/pam.d/gdm-password
注释行 "auth requied pam_succeed_if.so user != root quiet success"
修改:
sudo vim /etc/ssh/sshd_config
将PermitRootLogin后面的prohibit-password改为yes
修改:
sudo vi /usr/share/lightdm/lightdm.conf.d/50-ubuntu.conf
加入一行:greeter-show-manual-login=true
重启系统