One of them will immediately give an error message and the other will actually do something, taking some time to do its work. Note that for the first command to start you have to enter your password when you are asked for it.
After having done so, choose
System -> Administration -> Printing
in the menus. Right-click your printer's icon, choose "Properties" in the pop-up menu, then click "Change" in the "Make and Model:" line. After some time a dialog will pop up. Choose your printer's manufacturer ("Epson"), click "Forward", and then your printer's model ("Stylus S20"). Then on the right there will be a list with the available "Drivers". Choose an entry containing "OpenPrinting" there. Click "Forward" and then "Apply".
Run in a terminal window the two commands
sudo alien -ick openprinting- gutenprint- 5.2.4-1lsb3. 2.i486. rpm gutenprint- 5.2.4-1lsb3. 2.x86_64. rpm
sudo alien -ick openprinting-
One of them will immediately give an error message and the other will actually do something, taking some time to do its work. Note that for the first command to start you have to enter your password when you are asked for it.
After having done so, choose
System -> Administration -> Printing
in the menus. Right-click your printer's icon, choose "Properties" in the pop-up menu, then click "Change" in the "Make and Model:" line. After some time a dialog will pop up. Choose your printer's manufacturer ("Epson"), click "Forward", and then your printer's model ("Stylus S20"). Then on the right there will be a list with the available "Drivers". Choose an entry containing "OpenPrinting" there. Click "Forward" and then "Apply".
Try to print now. Does it work?