Yes, because escputil belongs to the 'usb' group. It should belong to the
same group as /dev/ulpt0, which should be 'cups'.

A 'chown :cups escputil' should fix that.

Thanks a lot it worked.

to check the ink level requires using a raw device so the -r option must be
there. I tried to do it without -u but it still saying "Cannot open
/dev/ulpt0 read/write: Device busy"
maybe there is another way to know the ink level? I checked the cups page
localhost:631 but found nothing there.
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