Linux下一般使用sane做为扫描仪后端，安装如下：
sudo apt-get install sane sane-utils xsane
@node1:~$ sudo sane-find-scanner
# 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.
could not fetch string descriptor: Pipe error
could not fetch string descriptor: Pipe error
found USB scanner (vendor=0x04a9 [Canon], product=0x190d [CanoScan]) at libusb:003:006
# Your USB scanner was (probably) detected. It may or may not be supported by
# SANE. Try scanimage -L and read the backend's manpage.
$ scanimage -L
device `pixma:04A9190D' is a CANON Canoscan 9000F Mark II multi-function peripheral
期间也曾装过VueScan，可以识别扫描仪，但是要收费。
$ simple-scan
终于可以使用扫描仪了。