на эти команды комп отвечает: 
 
[root@localhost root]# sane-find-scanner tool 
# No SCSI scanners found. If you expected something different, make sure that 
   
# you have loaded a SCSI driver for your SCSI adapter.   
 
# No USB scanners found. If you expected something different, make sure that   
# you have loaded a driver for your USB host controller and have installed a  
# kernel scanner module. 
 
# Scanners connected to the parallel port or other proprietary ports can't be 
   
# detected by this program. 
 
[root@localhost root] # scanimage -L   No scanners were identified.  
If you were expecting something different, 
check that the scanner is plugged in, turned on and detected by the 
sane-find-scanner tool (if appropriate).  
Please read the documentation 
which came with this software (README, FAQ, manpages). 
спасибо.