1. 修改 root 密码ubuntu
sudo passwd root
2. 以其余帐户登陆,经过 sudo nano 修改 /etc/ssh/sshd_config :ssh
xxx@ubuntu14:~$ su - root Password: root@ubuntu14:~# vi /etc/ssh/sshd_config
3. 注释掉 #PermitRootLogin without-password,添加 PermitRootLogin yespa
# Authentication: LoginGraceTime 120 #PermitRootLogin without-password PermitRootLogin yes StrictModes yes
4. 重启 ssh 服务rest
root@ubuntu14:~# sudo service ssh restart ssh stop/waiting ssh start/running, process 1499 root@ubuntu14:~#