我该如何修复此错误：E：无法获取？

Question

我该如何修复以下错误：

E: Failed to fetch http://ppa.launchpad.net/synapse-core/ppa/ubuntu/dists/xenial/main/binary-amd64/Packages  404  Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem.

Answer 1

404 表示页面或资源不可用。您可能指向了错误的 ppa 或 ppa 已被删除。最好从源中删除 ppa。

然后运行“sudo apt-get update”。