APT-KEY(8) - man page online | administration and privileged commands

APT key management utility.

15 &October &2015
APT-KEY(8)                                     APT                                     APT-KEY(8)


apt-key - APT key management utility


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


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.


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 update Update the local keyring with the archive keyring and remove from the local keyring the archive keys which are no longer valid.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, relying on update instead, but Ubuntu's APT does.


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.


/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.


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


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.


APT was written by the APT team <>.


Jason Gunthorpe APT team


1. APT bug page
APT 1.2.29 15 October 2015 APT-KEY(8)
This manual Reference Other manuals
apt-key(8) referred by add-apt-key(8) | apt-secure(8) | gak(8)
refer to apt-get(8) | apt-secure(8) | reportbug(1) | wget(1)