I want my program run autonomously after Jetson Xavier with ubuntu 18.04 power up, but when I use the command “sudo systemctl enable rc-local”, an error was occurred.
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.
Possible reasons for having this kind of units are:
- A unit may be statically enabled by being symlinked from another unit’s
.wants/ or .requires/ directory. - A unit’s purpose may be to act as a helper for some other unit which has
a requirement dependency on it. - A unit may be started when needed via activation (socket, path, timer,
D-Bus, udev, scripted systemctl call, …). - In case of template units, the unit is meant to be enabled with some
instance name specified.