I’ve written before about using one computers keyboard and mouse across multiple computers by using x2vnc and x2x, there is however another tool called Synergy. I never really messed around with it because of x2x and x2vnc but it is a valuable tool worth mentioning. QuickSynergy is available in most repositories that is a handy little tool to get your computers set up using Synergy and as the name suggests; quickly. If you apt-yum-get-fu it it will install all your dependencies for you and make setup a breeze.
Take a look at the screenshots:
In Ubuntu QuickSynergy can be launched from the Applications->Accessories in Fedora (at least the version I’m running) it is under Menu->Internet for some reason.
To share a keyboard and mouse simply give each side a name and click “Execute” on the share tab from the machines keyboard you want to use. On each of the clients clients click the use tab, enter the IP of the host, put the name of the screen and again click execute.. It really is as simple as that.
Tip: Once you have it set up and working you can run “ps ax” and see what command it uses if you want to run it manually in the future.