centos7开启root用户ssh登录

1、设置root密码

如果root未设置过密码，先以普通账号登录，然后输入以下命令来修改root密码：

sudo passwd root

2、开启root远程登录

1. 切换root用户

2. 修改sshd_config文件，将PermitRootLogin的值改成yes，并保存

3. 修改sshd_config文件，将PasswordAuthentication的值改成yes，并保存

   

4. 修改sshd_config文件，将PubkeyAuthentication的值改成yes，并保存

   

5. 修改认证文件/root/.ssh/authorized_keys

   vi /root/.ssh/authorized_keys
   

   删除如下内容

   no-port-forwarding,no-agent-forwarding,no-X11-forwarding,command="echo 'Please login as the user "centos" rather than the user "root".';echo;sleep 10"
   

   

6. 重启ssh服务

   # service sshd restart
   systemctl restart sshd.service
   

3、测试root远程登录成功

4、快捷脚步

sed -i 's/^#?PermitRootLogin yes./PermitRootLogin yes/g' /etc/ssh/sshd_config;
sed -i 's/^#?PasswordAuthentication yes./PasswordAuthentication yes/g' /etc/ssh/sshd_config;
sed -i 's/^#?PubkeyAuthentication yes./PubkeyAuthentication yes/g' /etc/ssh/sshd_config;
echo "" > /root/.ssh/authorized_keys;
service sshd restart;
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