我非常希望得到帮助。我一直试图从 Ubuntu 12.04 升级到 Ubuntu 14.04，但一直收到以下消息。
W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/hardy/universe/source/Sources 404 Not Found [IP: 91.189.91.15 80]
W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/hardy-updates/universe/source/Sources 404 Not Found [IP: 91.189.91.15 80]
E:Some index files failed to download. They have been ignored, or old ones used instead.`>
以下是
# deb cdrom:[Ubuntu 12.04.4 LTS _Precise Pangolin_ - Release amd64 (20140204)]/ dists/precise/main/binary-i386/
# deb cdrom:[Ubuntu 12.04.4 LTS _Precise Pangolin_ - Release amd64 (20140204)]/ dists/precise/restricted/binary-i386/
# deb cdrom:[Ubuntu 12.04.4 LTS _Precise Pangolin_ - Release amd64 (20140204)]/ precise main restricted
deb-src http://mirrors.gigenet.com/ubuntuarchive/ precise main restricted #Added by software-properties
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://mirrors.gigenet.com/ubuntuarchive/ precise main restricted
deb-src http://mirrors.gigenet.com/ubuntuarchive/ precise multiverse universe #Added by software-properties
## Major bug fix updates produced after the final release of the
## distribution.
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://mirrors.gigenet.com/ubuntuarchive/ precise universe
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://mirrors.gigenet.com/ubuntuarchive/ precise multiverse
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://mirrors.gigenet.com/ubuntuarchive/ precise-security main restricted
deb-src http://mirrors.gigenet.com/ubuntuarchive/ precise-security restricted main multiverse universe #Added by software-properties
deb http://mirrors.gigenet.com/ubuntuarchive/ precise-security universe
deb http://mirrors.gigenet.com/ubuntuarchive/ precise-security multiverse
## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
deb http://archive.canonical.com/ubuntu precise partner
deb-src http://archive.canonical.com/ubuntu precise partner
## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
deb http://extras.ubuntu.com/ubuntu precise main
deb-src http://extras.ubuntu.com/ubuntu precise main
deb http://archive.canonical.com/ precise partner
deb-src http://archive.canonical.com/ precise partner
deb http://hu.old-releases.ubuntu.com/ubuntu/ hardy universe
deb-src http://hu.old-releases.ubuntu.com/ubuntu/ hardy universe
deb http://hu.old-releases.ubuntu.com/ubuntu/ hardy-updates universe
deb-src http://hu.old-releases.ubuntu.com/ubuntu/ hardy-updates universe
deb http://mirrors.gigenet.com/ubuntuarchive/ precise-updates restricted main multiverse universe
deb-src http://mirrors.gigenet.com/ubuntuarchive/ precise-updates restricted main multiverse universe #Added by software-properties
deb http://mirrors.gigenet.com/ubuntuarchive/ precise-proposed restricted main multiverse universe
答案1
将其复制并粘贴到“ /etc/apt/sources.list ”文件中，然后运行
这将不再包括 Hardy 的软件但它可以完成任务。
# deb cdrom:[Ubuntu 12.04.4 LTS _Precise Pangolin_ - Release amd64 (20140204)]/ dists/precise/main/binary-i386/
# deb cdrom:[Ubuntu 12.04.4 LTS _Precise Pangolin_ - Release amd64 (20140204)]/ dists/precise/restricted/binary-i386/
# deb cdrom:[Ubuntu 12.04.4 LTS _Precise Pangolin_ - Release amd64 (20140204)]/ precise main restricted
deb-src http://mirrors.gigenet.com/ubuntuarchive/ precise main restricted #Added by software-properties
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://mirrors.gigenet.com/ubuntuarchive/ precise main restricted
deb-src http://mirrors.gigenet.com/ubuntuarchive/ precise multiverse universe #Added by software-properties
## Major bug fix updates produced after the final release of the
## distribution.
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://mirrors.gigenet.com/ubuntuarchive/ precise universe
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://mirrors.gigenet.com/ubuntuarchive/ precise multiverse
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://mirrors.gigenet.com/ubuntuarchive/ precise-security main restricted
deb-src http://mirrors.gigenet.com/ubuntuarchive/ precise-security restricted main multiverse universe #Added by software-properties
deb http://mirrors.gigenet.com/ubuntuarchive/ precise-security universe
deb http://mirrors.gigenet.com/ubuntuarchive/ precise-security multiverse
## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
deb http://archive.canonical.com/ubuntu precise partner
deb-src http://archive.canonical.com/ubuntu precise partner
## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
deb http://extras.ubuntu.com/ubuntu precise main
deb-src http://extras.ubuntu.com/ubuntu precise main
deb http://archive.canonical.com/ precise partner
deb-src http://archive.canonical.com/ precise partner
#deb http://hu.old-releases.ubuntu.com/ubuntu/ hardy universe
#deb-src http://hu.old-releases.ubuntu.com/ubuntu/ hardy universe
#deb http://hu.old-releases.ubuntu.com/ubuntu/ hardy-updates universe
#deb-src http://hu.old-releases.ubuntu.com/ubuntu/ hardy-updates universe
deb http://mirrors.gigenet.com/ubuntuarchive/ precise-updates restricted main multiverse universe
deb-src http://mirrors.gigenet.com/ubuntuarchive/ precise-updates restricted main multiverse universe #Added by software-properties
deb http://mirrors.gigenet.com/ubuntuarchive/ precise-proposed restricted main multiverse universe
然后运行
sudo apt-get update
sudo apt-get dist-upgrade && sudo do-release-upgrade