小编mar*_*uso的帖子

全新的ubuntu安装：

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 20.04.1 LTS
Release:        20.04
Codename:       focal

ssh.service 由于端口 22 已在使用，无法启动：

$ sudo service ssh status
? ssh.service - OpenBSD Secure Shell server
     Loaded: loaded (/lib/systemd/system/ssh.service; enabled; vendor preset: enabled)
     Active: failed (Result: exit-code) since Thu 2021-02-04 14:10:27 CST; 11min ago
       Docs: man:sshd(8)
             man:sshd_config(5)
    Process: 2041 ExecStartPre=/usr/sbin/sshd -t (code=exited, status=0/SUCCESS)
    Process: 2042 ExecStart=/usr/sbin/sshd -D $SSHD_OPTS (code=exited, status=255/EXCEPTION)
   Main PID: 2042 (code=exited, status=255/EXCEPTION)

Feb 04 14:10:27 ubu20a systemd[1]: …