Centos7修改ssh默认端口无法启动sshd服务

修改SSH默认的端口后保存 systemctl restart sshd.service后直接失败

Redirecting to /bin/systemctl restart sshd.service
Job for sshd.service failed because the control process exited with error code. See "systemctl status sshd.service" and "journalctl -xe" for details.

[[email protected] ssh]# systemctl status sshd.service
● sshd.service - OpenSSH server daemon
   Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: enabled)
   Active: activating (auto-restart) (Result: exit-code) since Wed 2020-11-04 03:27:12 EST; 16s ago
     Docs: man:sshd(8)
           man:sshd_config(5)
  Process: 25665 ExecStart=/usr/sbin/sshd -D $OPTIONS (code=exited, status=255)
 Main PID: 25665 (code=exited, status=255)

Nov 04 03:27:12 localhost.localdomain systemd[1]: sshd.service: main process exited, code=exited, status.../n/a
Nov 04 03:27:12 localhost.localdomain systemd[1]: Failed to start OpenSSH server daemon.
Nov 04 03:27:12 localhost.localdomain systemd[1]: Unit sshd.service entered failed state.
Nov 04 03:27:12 localhost.localdomain systemd[1]: sshd.service failed.

sshd -t 没有回馈
完全没有有用的信息，突然想起来selinux这个鬼东西没处理。。。

临时关闭SELinux

setenforce 0

临时打开SELinux

setenforce 1

永久关闭的话，请修改/etc/selinux/config文件，将SELINUX=enforcing修改为disabled

关闭后再重新启动sshd就没有报错了。

[[email protected] ssh]# systemctl restart sshd
[[email protected] ssh]#