when I try to upgrade the system ,it always failed.

W:无法下载 http://cn.archive.ubuntu.com/ubuntu/dists/precise-updates/main/binary-i386/Packages  404  Not Found
, W:无法下载 gzip:/var/lib/apt/lists/partial/cn.archive.ubuntu.com_ubuntu_dists_precise_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.

what should i do ?


Try upgrading using a Live CD or USB. You can use unetbootin UnetBootin to install it on a USB. It's usually a good idea to do a clean install when upgrading.

| improve this answer | |
  • if i do a clean install, will i get my files lost? – layla Jul 14 '13 at 4:37
  • Yes so you will need to back up your files either in the cloud, USB drive, external hard drive, or a CD/DVD. – user112224 Jul 14 '13 at 13:46

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