Ubuntu 18.04.1 LTS 更新不起作用 - 没有发布文件/GPG 错误

Question

当我尝试更新运行 Ubuntu 18.04.1 LTS 的笔记本电脑时，我使用这些命令sudo apt update，sudo apt-get update并且每次收到此消息时：

E: The repository 'cdrom://Ubuntu 18.04 LTS _Bionic Beaver_ - Release amd64 (20180426) bionic Release' does not have a Release file.
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.
W: GPG error: https://dl.bintray.com/resin-io/debian stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 379CE192D401AB61
E: The repository 'https://dl.bintray.com/resin-io/debian stable Release' 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.

操作系统更新了吗？我应该怎么做才能更新？

Answer 1

只需从sources.list中删除上面的存储库，

The repository 'cdrom://Ubuntu 18.04 LTS _Bionic Beaver_ - Release amd64

并尝试更新并再次升级您的系统。

希望这可以帮助。