gpg

• List public/private keys
• Export public/private keys
• Import public/private keys
• Sign/trust other keys
• Delete public/private keys

GNU Privacy Guard

List public/private keys

$ gpg --list-keys
$ gpg --list-secret-keys

Export public/private keys

$ gpg --export --armor [email_address]
$ gpg --export-secret-key --armor [email_address]

Import public/private keys

$ gpg --import [public_key_file.asc]
$ gpg --allow-secret-key-import --import [private_key_file.asc]

Sign/trust other keys

$ # sign only
$ gpg --sign-key [email_address]
$ # trust only
$ gpg --edit-key [email_address] trust
$ # trust & sign
$ gpg --edit-key [email_address] tsign

Delete public/private keys

$ gpg --delete-key [email_address]
$ gpg --delete-secret-key [email_address]