Gpg
From DWIKI
GNU Privacy Guard
Links
Cheatsheet
What is my key ID?
gpg --list-keys you@example.com
The bit after the / in the pub line!
Generate key
gpg --gen-key
Export public key
gpg --export me@example.com > public.key
Export private key
gpg --export-secret-key me@example.com > private.key
Import private key
gpg --import private.key
FAQ
gpg: decryption failed: No secret key"
Means you're using gpg2 --use-agent, which is broken