1. 安装更新ssh服务器

sudo apt-get install openssh-server

输入密码

2. 开启ssh服务

sudo service ssh start

3.设置开机自启ssh服务

sudo systemctl enable ssh

切记：上面这行代码是设置自启动的，如果不需要自启动或者是每次想自己连接的话，可以执行下面这行代码关闭

sudo systemctl disable ssh

4.重启检查

reboot

5.检查是否设置成功

sudo systemctl status ssh

结果如下，Active：active（running）即设置成功啦。

ubuntu@ubuntu-virtual-machine:~/桌面$ sudo systemctl status ssh
[sudo] password for ubuntu: 
● ssh.service - OpenBSD Secure Shell server
     Loaded: loaded (/lib/systemd/system/ssh.service; enabled; vendor preset: e>
     Active: active (running) since Sun 2022-07-10 17:42:47 CST; 2min 5s ago
       Docs: man:sshd(8)
             man:sshd_config(5)
    Process: 1532 ExecStartPre=/usr/sbin/sshd -t (code=exited, status=0/SUCCESS)
   Main PID: 1569 (sshd)
      Tasks: 1 (limit: 4588)
     Memory: 4.2M
     CGroup: /system.slice/ssh.service
             └─1569 sshd: /usr/sbin/sshd -D [listener] 0 of 10-100 startups