run pgp on ubuntu

install gnupg

sudo apt-get install pgp

it really appears to 'selecting 'pgpgpg' instead of 'pgp'' .see http://www.gnupg.org/ for more detail

generating a new keypair

gpg --gen-key

generating a revocation certificate

gpg --output revoke.asc --gen-revoke mykey

list keys in your public keyring

gpg --list-keys

exporting a public key

gpg --output zizihjk.gpg --export zizihjk@gmail.com

import a public key

gpg --import zizihjk.gpg

encrypt a document

gpg --output doc .gpg --encrypt --recipient zizihjk@gmail.com doc

decrypt a encrypted document

gpg --output doc --decrypt doc.gpg