The great copy/paste clipboard tools Klipper and Glipper have both been abandoned and removed from the main repositories. The replacement is just as good, though: Parcellite. It supports the keys features you'd expect from a tool like this:

  • Keeps a clipboard history.
  • Various view options to display items the way you like it.
  • Daemon mode; guard your clipboard contents when you close applications.
  • Global hotkeys to display your items quickly.
  • Perform custom commands using clipboard contents.

It's available for Fedora:

sudo yum install parcellite

And Ubuntu:

sudo apt-get install parcellite