Generate a GnuPG key pair

Use the following to generate a gpg key pair:

gpg --full-generate-key

Export and import a single key pair

# export the keys
gpg --export-secret-keys -a foo@bar.com > private.key.asc
gpg --export -a foo@bar.com > public.key.asc

# import the keys
gpg --import private.key.asc
gpg --import public.key.asc

Export and import all key pairs

The following technique is useful for backup and migration of gpg keys:

# export public and private keys, along with owner trust data
gpg --export-secret-keys -a > private-keys.asc
gpg --export -a > public-keys.asc
gpg --export-ownertrust > owner-trust.txt

# import public and private keys, along with owner trust data
gpg --import private-keys.asc
gpg --import public-keys.asc
gpg --import-ownertrust owner-trust.txt