Comment 13 for bug 1799697

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Dan Streetman (ddstreet) wrote :

ubuntu@lp1799697-c:~$ dpkg -l | grep knockd
ii knockd 0.7-1ubuntu1 amd64 small port-knock daemon
ubuntu@lp1799697-c:~$ sudo systemctl enable knockd
Synchronizing state of knockd.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable knockd
The unit files have no installation config (WantedBy, RequiredBy, Also, Alias
settings in the [Install] section, and DefaultInstance for template units).
This means they are not meant to be enabled using systemctl.

ubuntu@lp1799697-c:~$ dpkg -l | grep knockd
ii knockd 0.7-1ubuntu1.18.10.1 amd64 small port-knock daemon
ubuntu@lp1799697-c:~$ sudo systemctl enable knockd
Synchronizing state of knockd.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable knockd
ubuntu@lp1799697-c:~$