1APT-KEY(8) APT APT-KEY(8)
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6 apt-key - APT key management utility
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9 apt-key [--keyring filename] {add filename | del keyid | export keyid |
10 exportall | list | finger | adv | update | net-update |
11 {-v | --version} | {-h | --help}}
12
14 apt-key is used to manage the list of keys used by apt to authenticate
15 packages. Packages which have been authenticated using these keys will
16 be considered trusted.
17 Note that if usage of apt-key is desired the additional installation of
19 the GNU Privacy Guard suite (packaged in gnupg) is required. For this
20 reason alone the programmatic usage (especially in package maintainer
21 scripts!) is strongly discouraged. Further more the output format of
22 all commands is undefined and can and does change whenever the
23 underlying commands change. apt-key will try to detect such usage and
24 generates warnings on stderr in these cases.
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27 apt-key supports only the binary OpenPGP format (also known as "GPG key
28 public ring") in files with the "gpg" extension, not the keybox
29 database format introduced in newer gpg(1) versions as default for
30 keyring files. Binary keyring files intended to be used with any apt
31 version should therefore always be created with gpg --export.
32 Alternatively, if all systems which should be using the created keyring
34 have at least apt version >= 1.4 installed, you can use the ASCII
35 armored format with the "asc" extension instead which can be created
36 with gpg --armor --export.
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39 add filename
40 Add a new key to the list of trusted keys. The key is read from the
41 filename given with the parameter filename or if the filename is -
42 from standard input.
43 It is critical that keys added manually via apt-key are verified to
45 belong to the owner of the repositories they claim to be for
46 otherwise the apt-secure(8) infrastructure is completely
47 undermined.
48 Note: Instead of using this command a keyring should be placed
50 directly in the /etc/apt/trusted.gpg.d/ directory with a
51 descriptive name and either "gpg" or "asc" as file extension.
52 del keyid
54 Remove a key from the list of trusted keys.
55 export keyid
57 Output the key keyid to standard output.
58 exportall
60 Output all trusted keys to standard output.
61 list, finger
63 List trusted keys with fingerprints.
64 adv
66 Pass advanced options to gpg. With adv --recv-key you can e.g.
67 download key from keyservers directly into the trusted set of keys.
68 Note that there are no checks performed, so it is easy to
69 completely undermine the apt-secure(8) infrastructure if used
70 without care.
71 update (deprecated)
73 Update the local keyring with the archive keyring and remove from
74 the local keyring the archive keys which are no longer valid. The
75 archive keyring is shipped in the archive-keyring package of your
76 distribution, e.g. the debian-archive-keyring package in Debian.
77 Note that a distribution does not need to and in fact should not
79 use this command any longer and instead ship keyring files in the
80 /etc/apt/trusted.gpg.d/ directory directly as this avoids a
81 dependency on gnupg and it is easier to manage keys by simply
82 adding and removing files for maintainers and users alike.
83 net-update
85 Perform an update working similarly to the update command above,
86 but get the archive keyring from a URI instead and validate it
87 against a master key. This requires an installed wget(1) and an APT
88 build configured to have a server to fetch from and a master
89 keyring to validate. APT in Debian does not support this command,
90 relying on update instead, but Ubuntu's APT does.
91
93 Note that options need to be defined before the commands described in
94 the previous section.
95 --keyring filename
97 With this option it is possible to specify a particular keyring
98 file the command should operate on. The default is that a command
99 is executed on the trusted.gpg file as well as on all parts in the
100 trusted.gpg.d directory, though trusted.gpg is the primary keyring
101 which means that e.g. new keys are added to this one.
102
104 /etc/apt/trusted.gpg
105 Keyring of local trusted keys, new keys will be added here.
106 Configuration Item: Dir::Etc::Trusted.
107 /etc/apt/trusted.gpg.d/
109 File fragments for the trusted keys, additional keyrings can be
110 stored here (by other packages or the administrator). Configuration
111 Item Dir::Etc::TrustedParts.
112
114 apt-get(8), apt-secure(8)
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117 APT bug page[1]. If you wish to report a bug in APT, please see
118 /usr/share/doc/debian/bug-reporting.txt or the reportbug(1) command.
119
121 APT was written by the APT team <apt@packages.debian.org>.
122
124 Jason Gunthorpe
125 APT team
127
129 1. APT bug page
130 http://bugs.debian.org/src:apt
131APT 2.0.2 04 April 2019 APT-KEY(8)