你可能已經知道如何將你的 Ubuntu 桌面升級到最新版本了，不過如果你用的 Ubuntu Server，而且也正好又希望升級一下的話（前提是，不會影響你的應用。一般來說，對于服務器操作系統，應該采用保守態度。如果不是必須升級才能解決的安全問題，最好不要升級，而是采用各種外部手段來解決。）
如果想從Ubuntu14.04/13.10/13.04/12.10/12.04或者更老的版本升級到14.10，只要遵循下面給出的步驟。注意，你不能直接從13.10升級到14.10。你應該先將13.10升級到14.04在從14.04升級到14.10。下面是詳細步驟。
下面的步驟不僅能用于14.10，也兼容于一些像Lubuntu14.10，Kubuntu14.10和Xubuntu14.10等的Ubuntu衍生版本
重要：在升級之前，保險起見，不要忘了將你的數據在U盤或外部硬盤上保存一下。
服務器升級
從ubuntu14.04的服務器升級到14.10的服務器，采用下面的步驟。
安裝update-manager-core 這個包如果之前沒唷安裝的話：
復制代碼
代碼如下:
sudo apt-get install update-manager-core
編輯 /etc/update-manager/release-upgrades這個文件。
復制代碼
代碼如下:
sudo nano /etc/update-manager/release-upgrades
像下面那樣設置Prompt=normal或者Prompt=lts
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代碼如下:
# Default behavior for the release upgrader.
[DEFAULT]
# Default prompting behavior, valid options:
#
# never - Never check for a new release.
# normal - Check to see if a new release is available. If more than one new
# release is found, the release upgrader will attempt to upgrade to
# the release that immediately succeeds the currently-running
# release.
# lts - Check to see if a new LTS release is available. The upgrader
# will attempt to upgrade to the first LTS release available after
# the currently-running one. Note that this option should not be
# used if the currently-running release is not itself an LTS
# release, since in that case the upgrader won't be able to
# determine if a newer release is available.
Prompt=normal
[DEFAULT]
# Default prompting behavior, valid options:
#
# never - Never check for a new release.
# normal - Check to see if a new release is available. If more than one new
# release is found, the release upgrader will attempt to upgrade to
# the release that immediately succeeds the currently-running
# release.
# lts - Check to see if a new LTS release is available. The upgrader
# will attempt to upgrade to the first LTS release available after
# the currently-running one. Note that this option should not be
# used if the currently-running release is not itself an LTS
# release, since in that case the upgrader won't be able to
# determine if a newer release is available.
Prompt=normal
現在可以通過下面的命令來更新你的服務系統了。
復制代碼
代碼如下:
sudo do-release-upgrade -d
直到屏幕提示你已完成。
