我在运行时出现以下错误sudo apt-get update，我找到了类似的问题，但没有帮助我。我实际上需要修复这些问题。
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/Release Unable to find expected entry 'restricted/source/Sources' in Release file (Wrong sources.list entry or malformed file)
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty/Release Unable to find expected entry 'universe/source/Sources' in Release file (Wrong sources.list entry or malformed file)
E: Some index files failed to download. They have been ignored, or old ones used instead.
我没有看到任何与http://archive.ubuntu.com/ubuntu/dists/trusty/Release它/etc/apt/source.list实际来源有关的东西。
有人能建议解决此错误的好方法吗