If you're a hard-core Linux ham and you want to use the ARRL's "Logbook of the World" (LOTW), you are in for some work. The Linux binary software distribution is provided only for Fedora Core 3 distribution, which is now well out of date. You have to compile from source code, and even the source code is out of date with respect to current (Fedora Core 5) compilers and libraries.
Here is my cookbook recipe for how I did it on my FC5 system. I believe I've incorporated all the steps, but I would welcome your feedback if you try to replicate the results.
Fedora Core 6 is right around the corner, and FC6 may possibly require further modifications.
Added Note: The procedure has been found to work as recently as the Fedora 8 release. (12/2007)