无法从12.04LTS升级到14.04

我一直试图升级到14.04几天，但每次收到此错误消息：

W:Failed to fetch gzip:/var/lib/apt/lists/partial/security.ubuntu.com_ubuntu_dists_trusty-security_universe_i18n_Translation-en Encountered a section with no Package: header, E:Some index files failed to download. They have been ignored, or old ones used instead. 

Answer 1

也许你需要重建apt缓存：

 cd /var/lib/apt sudo mv lists lists.old sudo mkdir -p lists/partial sudo apt-get update 

http://ubuntuforums.org/showthread.php?t=1983220&page=5