apt-key(8)

NAME

   apt-key - APT key management utility

SYNOPSIS

   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.

   Note that if usage of apt-key is desired the additional installation of
   the GNU Privacy Guard suite (packaged in gnupg) is required. For this
   reason alone the programmatic usage (especially in package
   maintainerscripts!) is strongly discouraged. Further more the output
   format of all commands is undefined and can and does change whenever
   the underlying commands change.  apt-key will try to detect such usage
   and generates warnings on stderr in these cases.

SUPPORTED KEYRING FILES

   apt-key supports only the binary OpenPGP format (also known as "GPG key
   public ring") in files with the "gpg" extension, not the keybox
   database format introduced in newer gpg(1) versions as default for
   keyring files. Binary keyring files intended to be used with any apt
   version should therefore always be created with gpg --export.

   Alternatively, if all systems which should be using the created keyring
   have at least apt version >= 1.4 installed, you can use the ASCII
   armored format with the "asc" extension instead which can be created
   with gpg --armor --export.

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.

       Note: Instead of using this command a keyring should be placed
       directly in the /etc/apt/trusted.gpg.d/ directory with a
       descriptive name and either "gpg" or "asc" as file extension.

   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, finger
       List trusted keys with fingerprints.

   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 (deprecated)
       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.

       Note that a distribution does not need to and in fact should not
       use this command any longer and instead ship keyring files in the
       /etc/apt/trusted.gpg.d/ directory directly as this avoids a
       dependency on gnupg and it is easier to manage keys by simply
       adding and removing files for maintainers and users alike.

   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,
       relying on update instead, but Ubuntu's APT does.

OPTIONS

   Note that options need to be defined before the commands described in
   the previous section.

   --keyring filename
       With this option it is possible to specify a particular keyring
       file the command should operate on. The default is that a command
       is executed on the trusted.gpg file as well as on all parts in the
       trusted.gpg.d directory, though trusted.gpg is the primary keyring
       which means that e.g. new keys are added to this one.

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.

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

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