This is how you query the package database to see if a package is installed or not. [email protected] homer# yum list installed | grep xterm xterm.x86_64 293-1.fc19 @[email protected] homer# yum list installed | grep xterm xterm.x86_64 293-1.fc19 @anaconda This is a more verbose way of doing this. [email protected] homer# yum list installed xterm Loaded plugins: …