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translation by strugglingyouth
Linux FAQs with Answers--How to install Ubuntu desktop behind a proxy
================================================================================
> **Question**: My computer is connected to a corporate network sitting behind an HTTP proxy. When I try to install Ubuntu desktop on the computer from a CD-ROM drive, the installation hangs and never finishes while trying to retrieve files, which is presumably due to the proxy. However, the problem is that Ubuntu installer never asks me to configure proxy during installation procedure. Then how can I install Ubuntu desktop behind a proxy?
Unlike Ubuntu server, installation of Ubuntu desktop is pretty much auto-pilot, not leaving much room for customization, such as custom disk partitioning, manual network settings, package selection, etc. While such simple, one-shot installation is considered user-friendly, it leaves much to be desired for those users looking for "advanced installation mode" to customize their Ubuntu desktop installation.
In addition, one big problem of the default Ubuntu desktop installer is the absense of proxy settings. If your computer is connected behind a proxy, you will notice that Ubuntu installation gets stuck while preparing to download files.
![](https://c2.staticflickr.com/6/5683/22195372232_cea81a5e45_c.jpg)
This post describes how to get around the limitation of Ubuntu **installer and install Ubuntu desktop when you are behind a proxy**.
The basic idea is as follows. Instead of starting with Ubuntu installer directly, boot into live Ubuntu desktop first, configure proxy settings, and finally launch Ubuntu installer manually from live desktop. The following is the step by step procedure.
After booting from Ubuntu desktop CD/DVD or USB, click on "Try Ubuntu" on the first welcome screen.
![](https://c1.staticflickr.com/1/586/22195371892_3816ba09c3_c.jpg)
Once you boot into live Ubuntu desktop, click on Settings icon in the left.
![](https://c1.staticflickr.com/1/723/22020327738_058610c19d_c.jpg)
Go to Network menu.
![](https://c2.staticflickr.com/6/5675/22021212239_ba3901c8bf_c.jpg)
Configure proxy settings manually.
![](https://c1.staticflickr.com/1/735/22020025040_59415e0b9a_c.jpg)
Next, open a terminal.
![](https://c2.staticflickr.com/6/5642/21587084823_357b5c48cb_c.jpg)
Enter a root session by typing the following:
$ sudo su
Finally, type the following command as the root.
# ubiquity gtk_ui
This will launch GUI-based Ubuntu installer as follows.
![](https://c1.staticflickr.com/1/723/22020025090_cc64848b6c_c.jpg)
Proceed with the rest of installation.
![](https://c1.staticflickr.com/1/628/21585344214_447020e9d6_c.jpg)
--------------------------------------------------------------------------------
via: http://ask.xmodulo.com/install-ubuntu-desktop-behind-proxy.html
作者：[Dan Nanni][a]
译者：[译者ID](https://github.com/译者ID)
校对：[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
[a]:http://ask.xmodulo.com/author/nanni

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Linux 有问必答 - 如何通过代理服务器安装 Ubuntu 桌面
================================================================================
> **问题**: 我的电脑通过 HTTP 代理连接到公司网络。当我尝试从 CD-ROM 在计算机上安装 Ubuntu 桌面时，在检索文件时安装程序会被挂起，检索则不会完成，这可能是由于代理造成的。然而问题是，Ubuntu 的安装程序从不要求我在安装过程中配置代理。那我该怎么使用代理来安装 Ubuntu 桌面？
与 Ubuntu 服务器不太一样，安装 Ubuntu 桌面几乎都是自动安装，没有留下太多自定义的空间，如自定义磁盘分区，手动网络设置，包选择等等。尽管非常简单，一键安装被认为是用户友好的，它不需要用户寻找“高级安装模式”来定制自己的 Ubuntu 桌面。
此外，Ubuntu 默认桌面的安装程序中一个大问题是代理设置。如果你的计算机连接在一个代理上，你会发现 Ubuntu 安装时会卡在准备下载文件处。
![](https://c2.staticflickr.com/6/5683/22195372232_cea81a5e45_c.jpg)
这篇文章描述了如何解决当使用代理时 Ubuntu **安装程序的限制和安装 Ubuntu 桌面**。
其基本思路如下。不是直接使用 Ubuntu 的安装程序开始安装，首先进入 live Ubuntu 桌面，配置代理服务器，最后从 live 桌面手动启动 Ubuntu 的安装程序。以下是程序的安装步骤。
从 CD/DVD 或 USB 启动 Ubuntu 桌面后，点击第一个欢迎屏幕上的"Try Ubuntu"。
![](https://c1.staticflickr.com/1/586/22195371892_3816ba09c3_c.jpg)
一旦进入 live Ubuntu 桌面，点击左侧设置图标。
![](https://c1.staticflickr.com/1/723/22020327738_058610c19d_c.jpg)
进入 Network 菜单。
![](https://c2.staticflickr.com/6/5675/22021212239_ba3901c8bf_c.jpg)
手动配置代理服务器。
![](https://c1.staticflickr.com/1/735/22020025040_59415e0b9a_c.jpg)
接下来，打开一个终端。
![](https://c2.staticflickr.com/6/5642/21587084823_357b5c48cb_c.jpg)
通过输入以下命令切换到 root 用户：
$ sudo su
最后，在 root 用户下输入以下命令。
# ubiquity gtk_ui
然后将启动基于 GUI 的 Ubuntu 安装程序。
![](https://c1.staticflickr.com/1/723/22020025090_cc64848b6c_c.jpg)
继续安装其余部分。
![](https://c1.staticflickr.com/1/628/21585344214_447020e9d6_c.jpg)
--------------------------------------------------------------------------------
via: http://ask.xmodulo.com/install-ubuntu-desktop-behind-proxy.html
作者：[Dan Nanni][a]
译者：[strugglingyouth](https://github.com/strugglingyouth)
校对：[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
[a]:http://ask.xmodulo.com/author/nanni