將基本作業系統升級到 Freya

我有基本的 OS Luna，我想將它升級到 Freya。正如我過去在 Ubuntu 中所做的那樣，我一直在等待包管理器通知我新版本已發布併升級作業系統，但 Elementary 根本不這樣做。

我做了sudo apt-get dist-upgrade，但什麼也沒發生。我應該導入哪個源來升級整個系統？

謝謝！！

這是我的/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

目前，由於結果好壞參半，基本沒有提供更新管理器的升級路徑。有時有效，有時無效。你可以試試：

1. 備份一切。
2. 製作 Freya 安裝盤。
3. 從安裝盤啟動並選擇“升級”選項。

但是，正如我所說，結果可能會有所不同。始終建議執行全新安裝。升級不會為您提供與全新安裝完全相同的體驗，因為它不會覆蓋您的個人設置。這對於終端中的選項卡命名等新功能很重要。

引用自：https://unix.stackexchange.com/questions/198340