这与 无法在 Ubuntu 14.04 LTS (Trusty Tahr) 上获取更新
错误是：
Error during update
A problem occurred during the update. This is usually some sort of
network problem, please check your network connection and retry.
W:Failed to fetch
http://extras.ubuntu.com/ubuntu/dists/utopic/Release Unable to find
expected entry 'main/binary-amd-64/Packages' in Release file (Wrong
sources.list entry or malformed file)
, W:Failed to fetch
http://archive.ubuntu.com/ubuntu/dists/utopic/Release Unable to find
expected entry 'main/binary-amd-64/Packages' in Release file (Wrong
sources.list entry or malformed file)
, W:Failed to fetch
http://archive.ubuntu.com/ubuntu/dists/utopic-updates/Release Unable
to find expected entry 'main/binary-amd-64/Packages' in Release file
(Wrong sources.list entry or malformed file)
, W:Failed to fetch
http://archive.ubuntu.com/ubuntu/dists/utopic-backports/Release
Unable to find expected entry 'main/binary-amd-64/Packages' in
Release file (Wrong sources.list entry or malformed file)
, W:Failed to fetch
http://archive.ubuntu.com/ubuntu/dists/utopic-security/Release Unable
to find expected entry 'main/binary-amd-64/Packages' in Release file
(Wrong sources.list entry or malformed file)
, W:Failed to fetch
http://archive.ubuntu.com/ubuntu/dists/utopic-proposed/Release Unable
to find expected entry 'main/binary-amd-64/Packages' 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.
Restoring original system state
使用的命令是：
sudo do-release-upgrade
[更新]
正在 ping
ping archive.ubuntu.com
输出为：
64 bytes from obake.canonical.com (91.189.92.200): icmp_seq=1 ttl=52 time=294 ms
64 bytes from obake.canonical.com (91.189.92.200): icmp_seq=2 ttl=52 time=295 ms
64 bytes from obake.canonical.com (91.189.92.200): icmp_seq=3 ttl=52 time=295 ms
......直到我阻止了它。
还有系统设置->详细信息显示这是 14.04LTS
输出：
dpkg --print-architecture
是 amd64
我打开了/etc/apt/sources.list文件，没有提到 utopic。到处都是值得信赖的。
[更新 - 2]
我检查了上述链接，确实没有main/binary-amd-64/Packages但到处都有的条目main/binary-amd64/Packages（请注意 amd 和 64 之间的连字符）。
我使用了以下命令：
grep -r "amd-64" /etc/apt
并且没有输出。
答案1
备份/etc/apt/sources.list文件并注释掉/etc/apt/sources.list.d文件夹中的所有文件。然后使用以下命令sources.list进行升级：
deb http://it.archive.ubuntu.com/ubuntu/ trusty main universe restricted multiverse
deb-src http://it.archive.ubuntu.com/ubuntu/ trusty main universe restricted multiverse
deb http://security.ubuntu.com/ubuntu trusty-security main universe restricted multiverse
deb-src http://security.ubuntu.com/ubuntu trusty-security main universe restricted multiverse
deb http://it.archive.ubuntu.com/ubuntu/ trusty-updates main universe restricted multiverse
deb-src http://it.archive.ubuntu.com/ubuntu/ trusty-updates main universe restricted multiverse