so TKS1125 I suspect the way to install the iP2600 is:
- download cnijfilter-common_2.90-1_i386.rpm
then as caf4926 says:
normally in a terminal, cd to where the rpm is and go su, then type: rpm -ihv package name
- download cnijfilter-ip2600series-2.90-1.i386.rpm
again, # rpm -ivh cnijfilter-ip2600series-2.90-1.i386.rpm
hopefully, that will work;
if you successfully installed only cnijfilter-ip2600series-2.90-1.i386.rpm, I suspect you need to uninstall it with the command
rpm -e cnijfilter-ip2600series-2.90-1.i386.rpm
as it seems the common file needs to be installed first; having uninstalled the 2600 file, start at step 1) above;
this is only my interpretation of the Canon site: others may well choose to differ