systemctl enable fprintd.service fails

Question

Ubuntu 19.10

The fprintd.service file exists in /usr/lib/systemd/system.

sudo systemctl start fprintd.service works - starts the daemon

I want the fprintd.service to start on boot before login

sudo systemctl enable fprintd.service gives me

$ sudo systemctl enable fprintd.service
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.

How to fix???

Answer 1

All you have to do is to follow the instruction of the message. Open the fprintd.service file in an editor and add the following line under the section [Install]

[Install]
WantedBy=multi-user.target

This target is in most cases a good choice. If this doesn't work or you want another target, choose one by from this list

systemctl list-units --type target