W: GPG error: https://apt.repos.intel.com/openvino/2019 all InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY ACFA9FC57E6C5DBE E: The repository 'https://apt.repos.intel.com/openvino/2019 all InRelease' is...
E: 仓库 “https://mirrors.tuna.tsinghua.edu.cn/ubuntu focal-backports Release” 没有 Release 文件。
N: Updating from such a repository can't be done securely, and is therefore disabled by default. E: The repository 'http://security.ubuntu.com/ubuntu jammy-security InRelease' is not signed. E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/jammy-security/InRelease Clearsigned ...
because the public key is not available: NO_PUBKEY 871920D1991BC93CReading package lists... DoneW: http://security.ubuntu.com/ubuntu/dists/jammy-security/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable...
修复Ubuntu 和其他 Linux 发行版中 “Release file is not valid yet” 的错误。 错误的原因是系统上的时间和现实世界的时间不同。 你看,每个仓库文件都是在某个日期签名的,你可以通过查看发布文件信息了解: sudo head /var/lib/apt/lists/ports.ubuntu.com_ubuntu_dists_focal_InRelease ...
W: The repository 'http://ftp.de.debian.org/debian buster InRelease' is not signed. N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use. N: Seeapt-secure(8) manpage for repository creation and user configuration details. ...
After removing the troublesome PPAs, you should now be able to update/upgrade your system and manage your packages with ease. That’s it, guys. In this guide, we have shown you how to resolve the ‘the repository is not signed’ error on Ubuntu. I do hope that this guide was benefici...
E: The repository 'http://repo.mysql.com/apt/ubuntubionic InRelease' is not signed. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. ...
When trying to followthese instructionswith various StackOverflow answers recommending wheezy/snapshots/3.12.0, apt shows an error message that the repository signature is invalid and the repository is not signed: root@local:~# cat /etc/apt/sources.list.d/mono-xamarin.list deb http://download.mo...
W: GPG error: http://security.ubuntu.com/ubuntu jammy-security InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C E: The repository 'http://security.ubuntu.com/ubuntu jammy-security InRelease' is not signed. N: Updat...