This article is from the PGP FAQ, by Jeff Licquia firstname.lastname@example.org with numerous contributions by others.
The first step is always to extract the key to an ASCII-armored text
file with "pgp -kxa". After that, it depends on what type of computer
you want your key to be available on. Check the documentation for
that computer and/or its networking software.
Many computers running a Unix flavor will read information to be
displayed via finger from a file in each user's home directory called
".plan". If your computer supports this, you can put your public key
in this file. Ask your system administrator is you have problems with