add-apt-key

add-apt-key [ --help ] [ --verbose ] [ --keyserver name ] keyid

The add-apt-key will request the specified GPG key from a public keyserver and insert it into the APT keyring so that archives signed with that key will be trusted.

This program follows the usual GNU command line syntax, with long options starting with two dashes (--).
-h, --help

Show online help (usage).

-v, --verbose

verbose mode will show each command before it is executed.

-k, --keyserver name

Select a specific keyserver to use.

keyid

The GPG key identifier to add.

/etc/default/add-apt-key

Configuration file specifying the public keyserver to use.

The folling exit values are used:

0

Adding the keyid was successful.

1

Invalid script arguments.

2

GPG keyid cannot be retrieved (or is malformed).

3

Error in adding keyid to the APT keyring.

gpg(1), apt-key(8)