apt-key

       apt-key [--keyring filename] {add filename | del keyid | export keyid |
               exportall | list | finger | adv | update | net-update |
               {-v | --version} | {-h | --help}}

DESCRIPTION
       apt-key is used to manage the list of keys used by apt to authenticate
       packages. Packages which have been authenticated using these keys will
       be considered trusted.

COMMANDS
       add filename
           Add a new key to the list of trusted keys. The key is read from the
           filename given with the parameter filename or if the filename is -
           from standard input.

           It is critical that keys added manually via apt-key are verified to
           belong to the owner of the repositories they claim to be for
           otherwise the apt-secure(8) infrastructure is completely
           undermined.

       del keyid
           Remove a key from the list of trusted keys.

       export keyid
           Output the key keyid to standard output.

       exportall
           Output all trusted keys to standard output.

       list
           List trusted keys.

       finger
           List fingerprints of trusted keys.

       adv
           Pass advanced options to gpg. With adv --recv-key you can e.g.
           download key from keyservers directly into the the trusted set of
           keys. Note that there are no checks performed, so it is easy to
           completely undermine the apt-secure(8) infrastructure if used
           without care.

       update
           Update the local keyring with the archive keyring and remove from
           the local keyring the archive keys which are no longer valid. The
           archive keyring is shipped in the archive-keyring package of your
           distribution, e.g. the ubuntu-keyring package in Ubuntu.

       net-update
           Perform an update working similarly to the update command above,
           but get the archive keyring from a URI instead and validate it
           against a master key. This requires an installed wget(1) and an APT
           build configured to have a server to fetch from and a master
           keyring to validate. APT in Debian does not support this command,

FILES
       /etc/apt/trusted.gpg
           Keyring of local trusted keys, new keys will be added here.
           Configuration Item: Dir::Etc::Trusted.

       /etc/apt/trusted.gpg.d/
           File fragments for the trusted keys, additional keyrings can be
           stored here (by other packages or the administrator). Configuration
           Item Dir::Etc::TrustedParts.

       /etc/apt/trustdb.gpg
           Local trust database of archive keys.

       /usr/share/keyrings/ubuntu-archive-keyring.gpg
           Keyring of Ubuntu archive trusted keys.

       /usr/share/keyrings/ubuntu-archive-removed-keys.gpg
           Keyring of Ubuntu archive removed trusted keys.

SEE ALSO
       apt-get(8), apt-secure(8)

BUGS
       APT bug page[1]. If you wish to report a bug in APT, please see
       /usr/share/doc/debian/bug-reporting.txt or the reportbug(1) command.

AUTHOR
       APT was written by the APT team <apt@packages.debian.org>.

AUTHORS
       Jason Gunthorpe

       APT team

NOTES
        1. APT bug page
           http://bugs.debian.org/src:apt

APT 1.2.32                      15 October 2015                     APT-KEY(8)
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