When I do command sudo apt update, always get belowing errors: Err:1 http://archive.ubuntu.com/ubuntu bionic InRelease Could not connect to archive.ubuntu.com:80 (91.189.91.23). - connect (111: Connection refused) Could not connect to archive.ubuntu.…
在安装更新时,即在运行命令行sudo apt-get update 或者运行更新管理器的时候,出现W: GPG 错误: W: GPG error: http://ppa.launchpad.net/ondrej/php/ubuntu xenial InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 4F4EA0AAE5267A6C 可…
FROM : http://blog.csdn.net/ronghua_liu/article/details/8609450 当运行apt-get update后出现如下错误时:E: Some index files failed to download, they have been ignored, or old ones used instead. 可以将目录下/var/lib/apt/lists/partial/所有的文件清掉,再次运行apt-get update即可!自带源在大陆不好…
我使用sudo apt-get update之后,更新失败,遇到如下错误. W: Failed to fetch http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu/dists/precise/main/source/Sources 404 Not Found W: Failed to fetch http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu/dists/precise/main…