apt-key

APT-KEY(8)                            APT                           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 maintainer
       scripts!) 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

APT 2.0.10                       04 April 2019                      APT-KEY(8)