gpg
Replace gpg
with gpg2
if/as needed.
Cheatsheet
List a key, previously imported
$ gpg --list-keys <keyid>
List a key, previously imported
$ gpg --with-fingerprint --list-keys <keyid>
Import public key
$ gpg --import <path to public key file>
Verify file signature
$ gpg --verify <signature-file> <signed-file>
Display public key details without importing
$ gpg --with-fingerprint <path to public key file>
You may also search the key in a keyserver for further comparison/verification
$ gpg --search-keys <key id>
<Press Q to avoid importing key>