From a8ad492a1e4a215333d7c3c8127533e4cf8f48ed Mon Sep 17 00:00:00 2001 From: DarkSun Date: Sat, 12 Dec 2020 05:02:14 +0800 Subject: [PATCH] =?UTF-8?q?=E9=80=89=E9=A2=98[tech]:=2020201212=20How=20to?= =?UTF-8?q?=20List=20and=20Remove=20a=20GPG=20Key=20in=20Ubuntu?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit sources/tech/20201212 How to List and Remove a GPG Key in Ubuntu.md --- ... to List and Remove a GPG Key in Ubuntu.md | 146 ++++++++++++++++++ 1 file changed, 146 insertions(+) create mode 100644 sources/tech/20201212 How to List and Remove a GPG Key in Ubuntu.md diff --git a/sources/tech/20201212 How to List and Remove a GPG Key in Ubuntu.md b/sources/tech/20201212 How to List and Remove a GPG Key in Ubuntu.md new file mode 100644 index 0000000000..bf27c500a1 --- /dev/null +++ b/sources/tech/20201212 How to List and Remove a GPG Key in Ubuntu.md @@ -0,0 +1,146 @@ +[#]: collector: (lujun9972) +[#]: translator: ( ) +[#]: reviewer: ( ) +[#]: publisher: ( ) +[#]: url: ( ) +[#]: subject: (How to List and Remove a GPG Key in Ubuntu) +[#]: via: (https://www.2daygeek.com/how-to-list-and-remove-repository-gpg-key-in-ubuntu/) +[#]: author: (Magesh Maruthamuthu https://www.2daygeek.com/author/magesh/) + +How to List and Remove a GPG Key in Ubuntu +====== + +Some time ago we wrote an article about **[removing the PPA repository from the Ubuntu system][1]**. + +The PPA repository keys will not be removed as part of removing the PPA repository, and they will remain on the system. + +Today we are going to show you how to list and remove the added GPG keys from Ubuntu system. + +### What’s GPG key? + +The GPG key (it means Gnu Privacy Guard, aka GnuPG) is a free software which provides cryptographic privacy and authentication. + +It allow users to communicate securely using public-key cryptography. + +### How Does the GPG Key Work on Repository? + +All packages are signed with a pair of keys consisting of a private key and a public key, by the package maintainer. + +A user’s private key is kept secret and the public key may be given to anyone the user wants to communicate. + +Whenever you add a new repository to your system, you must also add a repository key so that the APT Package Manager trusts the newly added repository. + +Once you’ve added the repository keys, you can make sure you get the packages from the correct source. + +### How to List Repository keys? + +apt-key is used to manage the list of keys used by apt to authenticate packages. Trusted keys are stored in the following locations. + + * **/etc/apt/trusted.gpg** – Keyring of local trusted keys, new keys will be added here. + * **/etc/apt/trusted.gpg.d/** – File fragments for the trusted keys, additional keyrings can be stored here (by other packages or the administrator). + + + +Use the following command to list trusted keys with fingerprints. + +``` +$ sudo apt-key list + +/etc/apt/trusted.gpg +-------------------- +pub rsa4096 2017-12-15 [SCEA] + 0A0F AB86 0D48 5603 32EF B581 B754 42BB DE9E 3B09 +uid [ unknown] https://packagecloud.io/AtomEditor/atom (https://packagecloud.io/docs#gpg_signing) [email protected] +sub rsa4096 2017-12-15 [SEA] + +pub rsa4096 2016-04-22 [SC] + B9F8 D658 297A F3EF C18D 5CDF A2F6 83C5 2980 AECF +uid [ unknown] Oracle Corporation (VirtualBox archive signing key) [email protected] +sub rsa4096 2016-04-22 [E] + +pub dsa1024 2007-03-08 [SC] + 4CCA 1EAF 950C EE4A B839 76DC A040 830F 7FAC 5991 +uid [ unknown] Google, Inc. Linux Package Signing Key [email protected] +sub elg2048 2007-03-08 [E] + +pub rsa4096 2016-04-12 [SC] + EB4C 1BFD 4F04 2F6D DDCC EC91 7721 F63B D38B 4796 +uid [ unknown] Google Inc. (Linux Packages Signing Authority) [email protected] +sub rsa4096 2019-07-22 [S] [expires: 2022-07-21] + +/etc/apt/trusted.gpg.d/numix_ubuntu_ppa.gpg +------------------------------------------- +pub rsa1024 2013-08-13 [SC] + 43E0 7612 1739 DEE5 FB96 BBED 52B7 0972 0F16 4EEB +uid [ unknown] Launchpad PPA for Numix Maintainers + +/etc/apt/trusted.gpg.d/snwh_ubuntu_ppa.gpg +------------------------------------------ +pub rsa1024 2012-06-27 [SC] + D320 D0C3 0B02 E64C 5B2B B274 3766 2239 8999 3A70 +uid [ unknown] Launchpad PPA for Sam Hewitt + +/etc/apt/trusted.gpg.d/ubuntu-keyring-2012-archive.gpg +------------------------------------------------------ +pub rsa4096 2012-05-11 [SC] + 790B C727 7767 219C 42C8 6F93 3B4F E6AC C0B2 1F32 +uid [ unknown] Ubuntu Archive Automatic Signing Key (2012) [email protected] + +/etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg +------------------------------------------------------ +pub rsa4096 2012-05-11 [SC] + 8439 38DF 228D 22F7 B374 2BC0 D94A A3F0 EFE2 1092 +uid [ unknown] Ubuntu CD Image Automatic Signing Key (2012) [email protected] + +/etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg +------------------------------------------------------ +pub rsa4096 2018-09-17 [SC] + F6EC B376 2474 EDA9 D21B 7022 8719 20D1 991B C93C +uid [ unknown] Ubuntu Archive Automatic Signing Key (2018) [email protected] +``` + +### How to Delete/Remove Repository keys? + +You can remove the repository key if it is no longer needed or if the repository has already been removed from the system. + +It can be deleted by entering the full key with quotes as follows (which has a hex value of 40 characters). + +``` +$ sudo apt-key del "D320 D0C3 0B02 E64C 5B2B B274 3766 2239 8999 3A70" +OK +``` + +Alternatively, you can delete a key by entering only the last 8 characters. + +``` +$ sudo apt-key del 89993A70 +OK +``` + +Once you have removed the repository key, run the command **[apt command][2]** to refresh the repository index. + +``` +$ sudo apt update +``` + +You can verify that the above GPG key has been removed by running the following command. + +``` +$ sudo apt-key list +``` + +-------------------------------------------------------------------------------- + +via: https://www.2daygeek.com/how-to-list-and-remove-repository-gpg-key-in-ubuntu/ + +作者：[Magesh Maruthamuthu][a] +选题：[lujun9972][b] +译者：[译者ID](https://github.com/译者ID) +校对：[校对者ID](https://github.com/校对者ID) + +本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出 + +[a]: https://www.2daygeek.com/author/magesh/ +[b]: https://github.com/lujun9972 +[1]: https://www.2daygeek.com/how-to-remove-delete-ppas-on-ubuntu-linux-mint/ +[2]: https://www.2daygeek.com/apt-command-examples-manage-packages-debian-ubuntu-systems/