sshd 无法连接问题

查看sshd 状态

[root@haha-main-130 var]# systemctl status sshd -l
● 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 三 2022-10-26 10:02:14 EDT; 29s ago
     Docs: man:sshd(8)
           man:sshd_config(5)
  Process: 2089 ExecStart=/usr/sbin/sshd -D $OPTIONS (code=exited, status=255)
 Main PID: 2089 (code=exited, status=255)
 
10月 26 10:02:14 haha-main-130 systemd[1]: sshd.service: main process exited, code=exited, status=255/n/a
10月 26 10:02:14 haha-main-130 systemd[1]: Failed to start OpenSSH server daemon.
10月 26 10:02:14 haha-main-130 systemd[1]: Unit sshd.service entered failed state.
10月 26 10:02:14 haha-main-130 systemd[1]: sshd.service failed.

查看具体报错

root@haha-main-130 var]# sshd -t
/etc/ssh/sshd_config line 133: Subsystem 'sftp' already defined

解决方法：注释掉这行