我有基本操作系统 Luna，我想将其升级到 Freya。正如我过去在 Ubuntu 中所做的那样，我一直在等待包管理器通知我新版本已发布并升级操作系统，但 Elementary 根本不这样做。
我做到了sudo apt-get dist-upgrade，但什么也没发生。我应该导入哪个源来升级整个系统？
谢谢！！
这是我的/etc/apt/sources.list文件：
# deb cdrom:[elementary OS 0.2 _Luna_ - Stable amd64 (20130810)]/ dists/precise/main/binary-i386/
# deb cdrom:[elementary OS 0.2 _Luna_ - Stable amd64 (20130810)]/ dists/precise/restricted/binary-i386/
# deb cdrom:[elementary OS 0.2 _Luna_ - Stable amd64 (20130810)]/ precise main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://archive.ubuntu.com/ubuntu precise main restricted
deb-src http://archive.ubuntu.com/ubuntu precise main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://es.archive.ubuntu.com/ubuntu/ precise-updates main restricted
deb-src http://es.archive.ubuntu.com/ubuntu/ precise-updates main restricted
## 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://archive.ubuntu.com/ubuntu precise universe
deb-src http://archive.ubuntu.com/ubuntu precise universe
deb http://es.archive.ubuntu.com/ubuntu/ precise-updates universe
deb-src http://es.archive.ubuntu.com/ubuntu/ precise-updates 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://archive.ubuntu.com/ubuntu precise multiverse
deb-src http://archive.ubuntu.com/ubuntu precise multiverse
deb http://es.archive.ubuntu.com/ubuntu/ precise-updates multiverse
deb-src http://es.archive.ubuntu.com/ubuntu/ precise-updates 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://es.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://es.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu precise-security main restricted
deb-src http://security.ubuntu.com/ubuntu precise-security main restricted
deb http://security.ubuntu.com/ubuntu precise-security universe
deb-src http://security.ubuntu.com/ubuntu precise-security universe
deb http://security.ubuntu.com/ubuntu precise-security multiverse
deb-src http://security.ubuntu.com/ubuntu 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
## Uncomment the following two lines to add software from Ubuntu's
## 'extras' repository.
## 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
答案1
目前，Elementary 不提供更新管理器的升级路径，因为结果参差不齐。有时有效，有时无效。你可以试试：
- 备份一切。
- 制作Freya安装盘。
- 从安装盘启动并选择“升级”选项。
然而，正如我所说，结果可能会有所不同。始终建议执行全新安装。升级不会为您提供与全新安装完全相同的体验，因为它不会覆盖您的个人设置。这对于终端中的选项卡命名等新功能非常重要。