Create, sign, and publish your PGP key with Seahorse

“But the feature that makes Seahorse stand out the most is it’s
user-friendly interface. A task which other applications can make
new users shy away from, Seahorse makes simple. You can create,
sign, and publish your own keys to a keyserver quickly and
easily.

“Installing Seahorse

“More than likely Seahorse is already installed on your machine.
If you are using the GNOME desktop, chances are it is there. To
check to see if Seahorse is installed go to the GNOME Applications
menu and look in the Accessories sub-menu. If it’s there you’re
good to go. If not, you don’t have much to do.”

Complete Story