I have downloaded a driver that I think is the right one for my printer. It's called "m2300w-0.51.tar.gz".
I tried to follow the instructions for the pre-built RPM (according to Install - i don't know what RPM is) :
1. Make sure that all prerequisites are installed (Yes)
2. download m2300w-<version>.rpm from
(yes, does it matter to where, which folder, I have downloaded it?)
3. install or upgrade the rpm package (as root)
$ rpm -U m2300w-<version>.rpm
it can't find the command. What to do?