Установить sane и libsane-extras после чего подключить сканер
# sane-find-scanner will now attempt to detect your scanner. If the
# result is different from what you expected, first make sure your
# scanner is powered up and properly connected to your computer.
# No SCSI scanners found. If you expected something different, make sure that
# you have loaded a kernel SCSI driver for your SCSI adapter.
found USB scanner (vendor=0x03f0 [hewlett packard], product=0x2605 [hp scanjet], chip=RTS8822) at libusb:003:008
# Your USB scanner was (probably) detected. It may or may not be supported by
# SANE. Try scanimage -L and read the backend's manpage.
# Not checking for parallel port scanners.
# Most Scanners connected to the parallel port or other proprietary ports
# can't be detected by this program.
# You may want to run this program as root to find all devices. Once you
# found the scanner devices, be sure to adjust access permissions as
noname@noname:~$ scanimage -L
device `hp3900:libusb:003:008' is a Hewlett-Packard Scanjet 3800 flatbed scanner
Можно также добавить xsane