i. 在配置文件/etc/ssh/sshd_config文件中修改
17 Port 5522 18 #AddressFamily any 19 #ListenAddress 0.0.0.0 20 #ListenAddress ::
ii. 然后重启sshd
[root@localhost ~]# systemctl restart sshd
iii. 如果自定义端口，重启sshd出现如下报错：
[root@localhost ~]# systemctl restart sshd Job for sshd.service failed because the control process exited with error code. See "systemctl status sshd.service" and "journalctl -xe" for details.
查看详细如下：
[root@localhost ~]# journalctl -xe -- -- Unit sshd.service has failed. -- -- The result is failed. Jul 19 22:39:08 localhost.localdomain systemd[1]: Unit sshd.service entered failed state. Jul 19 22:39:08 localhost.localdomain systemd[1]: sshd.service failed. Jul 19 22:39:08 localhost.localdomain polkitd[695]: Unregistered Authentication Agent for unix-process:3128:1153611 Jul 19 22:39:38 localhost.localdomain polkitd[695]: Registered Authentication Agent for unix-process:3140:1156691 (s Jul 19 22:39:38 localhost.localdomain systemd[1]: Starting OpenSSH server daemon... -- Subject: Unit sshd.service has begun start-up -- Defined-By: systemd -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel -- -- Unit sshd.service has begun starting up. Jul 19 22:39:38 localhost.localdomain sshd[3146]: error: Bind to port 5522 on 0.0.0.0 failed: Permission denied. Jul 19 22:39:38 localhost.localdomain sshd[3146]: error: Bind to port 5522 on :: failed: Permission denied. Jul 19 22:39:38 localhost.localdomain sshd[3146]: fatal: Cannot bind any address. Jul 19 22:39:38 localhost.localdomain systemd[1]: sshd.service: main process exited, code=exited, status=255/n/a Jul 19 22:39:38 localhost.localdomain systemd[1]: Failed to start OpenSSH server daemon. -- Subject: Unit sshd.service has failed -- Defined-By: systemd -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel -- -- Unit sshd.service has failed. -- -- The result is failed. Jul 19 22:39:38 localhost.localdomain systemd[1]: Unit sshd.service entered failed state. Jul 19 22:39:38 localhost.localdomain systemd[1]: sshd.service failed. Jul 19 22:39:38 localhost.localdomain polkitd[695]: Unregistered Authentication Agent for unix-process:3140:1156691