1,
after modifying the sshd_config configuration file
vim /etc/ssh/sshd_config
2. Restart SSH
service ssh restart
3, the following error
Redirecting to /bin/systemctl restart ssh.service
Failed to restart ssh.service: Unit not found.
4, reason: the above command is centos6 inside the command, centos7 need to use
systemctl restart sshd
5, the problem is perfectly solved, nice