The file I'm trying to install:
ATI Driver Installer 46.0MB 7.12 Dec 20, 2007 Automated installer and Display Drivers for X.Org 6.7, 6.8, 6.9, 7.0, 7.1, 7.2, 7.3
These are the instructions that the ATI website gives me:
# Launch the Terminal Application/Window and navigate to the ATI Proprietary Linux driver download.
# Enter the command ati-driver-installer-7-12-x86.x86_64.run to launch the ATI Proprietary Linux driver installer. The ATI Proprietary Linux Driver Setup dialog box is displayed.
When I enter the second command, it says that it doesn't recognize the command.