
Introduction to PGP Command Line 175
used to build the Web of Trust. The format of a signature is as
follows:
# pgp --sign-key UID-of-key-to-be-signed --signer your-UID
--sig-type exportable --passphrase passphrase
You must tell PGP Command Line which key you want
to sign by using a unique portion of the UID. (You can sign
only with your own key.) Finally, you enter your pass-
phrase, and PGP Command Line will sign the other person’s
key and store it in your keyring.
Updating Keys on a Keyserver
After you sign a key, you can either export the signed public
key to a file and return it to the owner, or send the public key
with the updated signature ...