我的 Ubuntu 版本是 14.0.4
当我执行时出现以下错误apt-get update。
Get:28 http://archive.ubuntu.com trusty-security/multiverse i386 Packages [4,280 B]
Hit http://archive.ubuntu.com trusty-security/main Translation-en
Hit http://archive.ubuntu.com trusty-security/multiverse Translation-en
Hit http://archive.ubuntu.com trusty-security/restricted Translation-en
Hit http://archive.ubuntu.com trusty-security/universe Translation-en
Get:29 http://archive.ubuntu.com trusty Release [11.9 kB]
Get:30 http://archive.ubuntu.com trusty/main Sources [1,064 kB]
Fetched 1,429 kB in 14s (102 kB/s)
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://archive.ubuntu.com/ubuntu/dists/trusty/main/source/Sources
Hash Sum mismatch
E: Some index files failed to download. They have been ignored, or old ones used instead.
我错过了什么？