Displaying currently installed Linux rpm packages
You can verify if the prerequisite rpm packages are already installed on the Linux system by using the Linux rpm command. For example, you can check the Linux kernel rpm package by entering this at the command line:
rpm -qi cups-libs
If the rpm package is installed, the Linux operating system displays the name, version, release, and description of the rpm package. If the rpm package is not installed, the Linux operating system issues a message that the package is not installed. For a missing rpm package, use the Linux rpm command or the Add/Remove Software graphical interface utility to install the appropriate files from the Linux operating system distribution.