停用 Ubuntu 擾人的更新和升級通知

更新管理員 (update manager) 是 Ubuntu 內建的軟體更新套件，它就如同 Windows 一般會在背景偷偷運作並跳出善意的通知，讓我們知道可以進行更新 (Update) 和升級 (Upgrade)。

這對哥倆還有個共同的特色，那就是它們都會跳出煩人的對話視窗來打斷我們的思緒，對於喜愛使用指令 (command) 進行 GNU/Linux 更新和升級的凍仁而言是個很擾人的存在，幸好在 Ubuntu 上我們還可以手動關閉它，以下分別為圖形化介面 (GUI)和終端機介面 (Console) 的設定方法。

1. GUI

1. 開啟 update-manager。
2. 切到更新 update 的頁籤。
3. 停用更新通知：將 Automatically check for updates 一欄更改成 Never。
4. 停用升級通知：將 Notify me of a new Ubuntu version 一欄更改成 Never。

▲ Update Manager on Ubuntu 14.04

2. Console

2.1. 停用更新通知。

[ jonny@trusty ~ ]
$ sudo vi /etc/apt/apt.conf.d/10periodic [Enter]
#APT::Periodic::Update-Package-Lists "1";
APT::Periodic::Update-Package-Lists "0";
APT::Periodic::Download-Upgradeable-Packages "0";
APT::Periodic::AutocleanInterval "0";

2.2. 停用升級通知。

[ jonny@trusty ~ ]
$ sudo vi /etc/update-manager/release-upgrades [Enter]

# 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=lts
Prompt=never 

最後，我們也可以移除更新管理員來永絕後患，但前提是要會先學會怎麼裝得回來還有會定期使用指令更新才行。

[ jonny@trusty ~ ]
$ sudo apt-get remove update-manager-core [Enter]

資料來源：
★ How to disable the update manager popup? - Ask Ubuntu
★ upgrade - Disable Ubuntu Update Manager's new version warning - Ask Ubuntu