Docs: remove how_to_install_ubuntu{,cn}.md

docs/howto/README.md

@@ -86,12 +86,10 @@
 - [How to Run RTK Localization Module On Your Local Computer](how_to_run_RTK_localization_module_on_your_local_computer_cn.md)
 
 ## Others
-- [How to install ubuntu](how_to_install_ubuntu.md)
 - [How to use IRC client on ubuntu](how_to_use_IRC_client_on_ubuntu.md)
 - [How to generate and push images into Docker](how_to_generate_and_push_docker_images.md)
 
 ### Chinese versions
 
 - [How to generate and push images into Docker](how_to_generate_and_push_docker_images_cn.md)
-- [How to install ubuntu](how_to_install_ubuntu_cn.md)
 - [How to solve slow pull from cn](how_to_solve_slow_pull_from_cn.md)

docs/howto/how_to_install_ubuntu.md

-# How to Install Ubuntu Linux Operating System
-
-## Helpful hints before you begin:
-
-* It is recommended that you use Ubuntu 14.04.3.
-* You can type F2 during the system boot process to enter the BIOS settings. It is recommended that you disable Quick Boot and Quiet Boot in the BIOS to make it easier to catch any issues in the boot process.
-* The IPC must have internet access to update and install software. Make sure that the Ethernet cable is connected to a network with Internet access. You might need to configure the network for the IPC if the network that it is connected to is not using the Dynamic Host Configuration Protocol (DHCP).
-* For more information about Ubuntu, see Ubuntu for Desktop web site: https://www.ubuntu.com/desktop.
-## Installing Ubuntu Linux:
-Follow these steps:
-1.	Create a bootable Ubuntu Linux USB flash drive:
-Download Ubuntu (or a variant such as Xubuntu) and follow the online instructions to create a bootable USB flash drive.
-2.	Install Ubuntu Linux:
-    * Insert the Ubuntu installation drive into a USB port and turn on the system. 
-    * Install Linux by following the on-screen instructions.
-3.	Perform a software update and installation: 
-    * Reboot into Linux after the installation is done. 
-    * Launch the Software Updater to update to the latest software packages (for the installed distribution) or type the following commands in a terminal program such as GNOME Terminal.
-      ```sudo apt-get update``` |
-      ```sudo apt-get upgrade```
-4.  Launch a terminal program such as GNOME Terminal and type the following command to install the Linux 4.4 kernel:
-      ```sudo apt-get install linux-generic-lts-xenial```

docs/howto/how_to_install_ubuntu_cn.md

-# 如何安装linux操作系统
-
-## 开始工作前的帮助性信息
-
-* 我们推荐使用Ubuntu 14.04。
-
-* 在系统启动时按下F2（或其他按键，请参考系统文档）进入BIOS设置，我们建议禁用Quick Boot和Quiet Boot设置以更容易的在启动时捕获错误信息。
-
-* IPC必须有网络连接以更新和安装软件。确保IPC的以太网线接入了有互联网访问权限的网络。如果接入的网络没有使用动态主机配置协议（DHCP），使用者可能需要对IPC的网络进行配置。
-
-* 更多关于Ubuntu的信息请参考Ubuntu桌面版的网站：https://www.ubuntu.com/desktop。
-
-## 安装Ubuntu Linux
-按照下述步骤执行：
-1.	创建一个可引导的Ubuntu Linux USB启动盘：
-
-    下载Ubuntu 14.04（或其他的变种系统如Xubuntu）并创建一个可引导的USB启动盘。
-
-2.	安装Ubuntu Linux：
-
-    * 将安装Unbuntu的USB启动盘插入USB接口中并启动系统
-    * 按照屏幕提示执行安装
-    
-3.	执行软件更新：
-
-    * 安装结束后重启并进入系统
-    * 启动Software Update并更新到最新软件包，或在终端程序如GNOME Terminal中执行下述指令完成更新：
-      ```sudo apt-get update``` |
-      ```sudo apt-get upgrade```
-      
-4.  启动终端程序如GNOME Terminal，执行下述指令安装Linux 4.4内核：
-
-      ```sudo apt-get install linux-generic-lts-xenial```