2023年12月7日发(作者：车睿聪)
Ubuntu20.04-解决Failedtoenableunit：Unitfilesshd。。。
文章目录
Ubuntu 版本信息：
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.3 LTS
Release: 20.04
Codename: focal
起因
事情是这样的，原本 SSH 服务是可用的：
$ sudo systemctl status sshd
[sudo] password for mk:
● e - OpenBSD Secure Shell server
Loaded: loaded (/lib/systemd/system/e; enabled; vendor preset: enabled)
Active: active (running) since Sat 2022-02-19 19:19:56 CST; 1min 23s ago
Docs: man:sshd(8)
man:sshd_config(5)
Process: 840 ExecStartPre=/usr/sbin/sshd -t (code=exited, status=0/SUCCESS)
Main PID: 856 (sshd)
Tasks: 1 (limit: 4588)
Memory: 2.4M
CGroup: //e
└─856 sshd: /usr/sbin/sshd -D [listener] 0 of 10-100 startups
2月 19 19:19:56 mk-virtual-machine systemd[1]: Starting OpenBSD Secure
2月 19 19:19:56 mk-virtual-machine sshd[856]: Server listening on 0.0.0.0 port 22.
2月 19 19:19:56 mk-virtual-machine sshd[856]: Server listening on :: port 22.
2月 19 19:19:56 mk-virtual-machine systemd[1]: Started OpenBSD Secure Shell server.
嗯，我手痒，执行了
sudo systemctl disable sshd
命令：
$ sudo systemctl disable sshd
Removed /etc/systemd/system/e.
Removed /etc/systemd/system//e.
当我再次使用
sudo systemctl status sshd
命令，就出现了：
$ sudo systemctl status sshd
Unit e could not be found.
使用
sudo systemctl enable sshd
或
sudo systemctl restart sshd
命令，也出现类似情况：
$ sudo systemctl enable sshd
Failed to enable unit: Unit file e does not exist.
$ sudo systemctl restart sshd
Failed to restart e: Unit e not found.
解决方法
后来是卸载、重装 SSH 才得以解决：
$ sudo apt-get remove --purge openssh-server
$ sudo apt-get update
$ sudo apt-get install openssh-server参考
2023年12月7日发(作者：车睿聪)
Ubuntu20.04-解决Failedtoenableunit：Unitfilesshd。。。
文章目录
Ubuntu 版本信息：
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.3 LTS
Release: 20.04
Codename: focal
起因
事情是这样的，原本 SSH 服务是可用的：
$ sudo systemctl status sshd
[sudo] password for mk:
● e - OpenBSD Secure Shell server
Loaded: loaded (/lib/systemd/system/e; enabled; vendor preset: enabled)
Active: active (running) since Sat 2022-02-19 19:19:56 CST; 1min 23s ago
Docs: man:sshd(8)
man:sshd_config(5)
Process: 840 ExecStartPre=/usr/sbin/sshd -t (code=exited, status=0/SUCCESS)
Main PID: 856 (sshd)
Tasks: 1 (limit: 4588)
Memory: 2.4M
CGroup: //e
└─856 sshd: /usr/sbin/sshd -D [listener] 0 of 10-100 startups
2月 19 19:19:56 mk-virtual-machine systemd[1]: Starting OpenBSD Secure
2月 19 19:19:56 mk-virtual-machine sshd[856]: Server listening on 0.0.0.0 port 22.
2月 19 19:19:56 mk-virtual-machine sshd[856]: Server listening on :: port 22.
2月 19 19:19:56 mk-virtual-machine systemd[1]: Started OpenBSD Secure Shell server.
嗯，我手痒，执行了
sudo systemctl disable sshd
命令：
$ sudo systemctl disable sshd
Removed /etc/systemd/system/e.
Removed /etc/systemd/system//e.
当我再次使用
sudo systemctl status sshd
命令，就出现了：
$ sudo systemctl status sshd
Unit e could not be found.
使用
sudo systemctl enable sshd
或
sudo systemctl restart sshd
命令，也出现类似情况：
$ sudo systemctl enable sshd
Failed to enable unit: Unit file e does not exist.
$ sudo systemctl restart sshd
Failed to restart e: Unit e not found.
解决方法
后来是卸载、重装 SSH 才得以解决：
$ sudo apt-get remove --purge openssh-server
$ sudo apt-get update
$ sudo apt-get install openssh-server参考