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Description
It seems that usbguard fails to start if rule line in rules.conf ends with space character. (Problem may also occur with other lines, i did not check that.)
I added a new rule and tried to stop and start usbguard again:
jk@ktt:~$ sudo service usbguard start
jk@ktt:~$ service usbguard status
● usbguard.service - USBGuard daemon
Loaded: loaded (/lib/systemd/system/usbguard.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Thu 2022-12-01 15:27:44 EET; 4s ago
Docs: man:usbguard-daemon(8)
Process: 859369 ExecStart=/usr/sbin/usbguard-daemon -k -c /etc/usbguard/usbguard-daemon.conf (code=exited, status=1/FAILURE)
Main PID: 859369 (code=exited, status=1/FAILURE)
joulu 01 15:27:44 ktt systemd[1]: usbguard.service: Scheduled restart job, restart counter is at 5.
joulu 01 15:27:44 ktt systemd[1]: Stopped USBGuard daemon.
joulu 01 15:27:44 ktt systemd[1]: usbguard.service: Start request repeated too quickly.
joulu 01 15:27:44 ktt systemd[1]: usbguard.service: Failed with result 'exit-code'.
joulu 01 15:27:44 ktt systemd[1]: Failed to start USBGuard daemon.
Then I removed the space at the end of the newly added rule line and tried again:
jk@ktt:~$ sudo service usbguard start
jk@ktt:~$ service usbguard status
● usbguard.service - USBGuard daemon
Loaded: loaded (/lib/systemd/system/usbguard.service; enabled; vendor preset: enabled)
Active: active (running) since Thu 2022-12-01 15:28:21 EET; 6s ago
Docs: man:usbguard-daemon(8)
Main PID: 859471 (usbguard-daemon)
Tasks: 3 (limit: 9274)
Memory: 1.4M
CGroup: /system.slice/usbguard.service
└─859471 /usr/sbin/usbguard-daemon -k -c /etc/usbguard/usbguard-daemon.conf
Please add support for having spaces or make usbguard to remove them automatically when reading the conf file.
I don't know the usbguard version, but it is the default version coming with the Ubuntu 22.04 which is my OS.