GPG key di repository Linux digunakan untuk validasi paket-paket yand di download, tanpa GPG key yang dikenali oleh sistem anda, dalam hal ini apt (apt-get) akan menolak untuk mengambil data dari repository yang keynya tidak ditemukan.
Repository Gitlab Community Edition muncul warning
Err:4 https://packages.gitlab.com/gitlab/gitlab-ce/debian buster InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3F01618A51312F3F Fetched 23.3 kB in 4s (5,753 B/s) Reading package lists... Done Building dependency tree Reading state information... Done All packages are up to date. W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://packages.gitlab.com/gitlab/gitlab-ce/debian buster InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3F01618A51312F3F W: Failed to fetch https://packages.gitlab.com/gitlab/gitlab-ce/debian/dists/buster/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3F01618A51312F3F W: Some index files failed to download. They have been ignored, or old ones used instead.
Cek key yang sudah terinstall di system anda
> apt-key list /etc/apt/trusted.gpg -------------------- pub rsa4096 2015-04-17 [SC] [expires: 2020-04-15] 1A4C 919D B987 D435 9396 38B9 1421 9A96 E15E 78F4 uid [ unknown] GitLab B.V. (package repository signing key) <packages@gitlab.com>
Expired tanggal 15 April 2020, tetapi sudah direject oleh gitlab.
GPG key terbaru Gitlab bisa didownload di https://packages.gitlab.com/gpg.key, atau langsung dengan curl
curl https://packages.gitlab.com/gpg.key | sudo apt-key add
Coba cek update dengan apt, sudah tidak ada masalah lagi.
apt update # output ... Get:4 https://packages.gitlab.com/gitlab/gitlab-ce/debian buster InRelease [23.3 kB] Get:5 https://packages.gitlab.com/gitlab/gitlab-ce/debian buster/main amd64 Packages [10.7 kB] Fetched 34.0 kB in 4s (7,811 B/s) Reading package lists... Done Building dependency tree Reading state information... Done 1 package can be upgraded. Run 'apt list --upgradable' to see it.
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