权限问题
1. 登陆对应ssh目录
cd /etc/ssh
2. 赋权
chmod 700
chmod 744 ssh_host_ecdsa_key ssh_host_rsa_ key
3. 重启sshd服务
centos7:
systemctl restart sshd
centos6:
service sshd restart
cd /etc/ssh
chmod 700
chmod 744 ssh_host_ecdsa_key ssh_host_rsa_ key
centos7:
systemctl restart sshd
centos6:
service sshd restart