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 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