Ubuntu系统root用户远程登录

通过CRT远程登录Ubuntu时遇到报错：

The client has disconnected from the server. Reason:

Unable to authenticate using any of the configured authentication methods.

Ubuntu初始登录只能是普通用户，想用root登录，需普通用户登录，然后切换为root用户，先设置root密码，再更改sshd_config文件

ixo@snort:~$ sudo su

Password:

root@snort:/home/ixo#sudo passwd root

New password:

Retype new password:

passwd: password updated successfully

root@snort:/home/ivo# nano /etc/ssh/sshd_config

注意：是sshd_config，而不是ssh_config

...

#port 22

port 22

#PermitRootLogin prohibit-password

PermitRootLogin yes # 允许root直接登录

保存后重启ssh服务

sudo service ssh restart