主要思路

大同小异，修改 sshd——config 文件，把里面的 PasswordAuthentication 和 PermitRootLogin 都改成 Yes

修改SSH配置文件/etc/ssh/sshd_config

vi /etc/ssh/sshd_config

找到PermitRootLogin和 PasswordAuthentication

# Authentication:
LoginGraceTime 120
PermitRootLogin yes //默认为no，需要开启root用户访问改为
yesStrictModes yes 

# Change to no to disable tunnelled clear text passwords
PasswordAuthentication yes //默认为no，改为yes开启密码登陆

重启SSH服务
Ubuntu/debian适用

/etc/init.d/ssh restart

Centos 7适用

systemctl restart sshd.service

方便起见

sudo sed -i 's/^#\?PermitRootLogin.*/PermitRootLogin yes/g' /etc/ssh/sshd_config;
sudo sed -i 's/^#\?PasswordAuthentication.*/PasswordAuthentication yes/g' /etc/ssh/sshd_config;
sudo service sshd restart