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Translating----geekpi
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Linux FAQs with Answers--How to boot into command line on Ubuntu or Debian
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================================================================================
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> **Question**: I am running Ubuntu desktop, but I want to boot straight into text-mode console temporarily. What is a convenient way to disable desktop GUI and boot into a terminal?
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Linux desktop comes with a display manager (e.g., GDM, KDM, LightDM), which lets the desktop machine automatically boot into a GUI-based login environment. However, what if you want to disable GUI and boot straight into a text-mode console? For example, you are troubleshooting desktop related issues, or want to run a heavy-duty application that does not require desktop GUI.
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Note that you can temporarily switch from desktop GUI to a virtual console by pressing Ctrl+Alt+F1 to F6. However, in this case your desktop GUI will be still running in the background, and thus is different from pure text-mode booting.
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On Ubuntu or Debian desktop, you can enable text-mode booting by passing appropriate kernel parameters.
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### Boot into Command-line Temporarily ###
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If you want to disable desktop GUI and boot in text-mode just one-time, you can use GRUB menu interface.
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First, power on your desktop. When you see the initial GRUB menu, press 'e'.
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This will lead you to the next screen, where you can modify kernel booting parameters. Scroll down the screen to look for a line that begins with "linux", which indicates a list of kernel parameters. Remove from the list "quiet" and "splash". Add "text" in the list instead.
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The updated kernel parameter list looks like the following. Press Ctrl+x to continue booting. This will enable one-time console booting in verbose mode.
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Boot into Command-line Permanently
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If you want to boot into command-line permanently, you need to [update GRUB configuration][1] which defines kernel booting parameters.
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Open a default GRUB config file with a text editor.
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$ sudo vi /etc/default/grub
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Look for a line that starts with GRUB_CMDLINE_LINUX_DEFAULT, and comment out that line by prepending # sign. This will disable the initial splash screen, and enable verbose mode (i.e., showing the detailed booting procedure).
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Then change GRUB_CMDLINE_LINUX="" to:
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GRUB_CMDLINE_LINUX="text"
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Next, uncomment the line that says "#GRUB_TERMINAL=console".
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The updated GRUB defult configuration looks like the following.
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Finally, invoke update-grub command to re-generate a GRUB2 config file under /boot, based on these changes.
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$ sudo update-grub
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At this point, your desktop should be switched from GUI booting to console booting. Verify this by rebooting.
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--------------------------------------------------------------------------------
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via: http://ask.xmodulo.com/boot-into-command-line-ubuntu-debian.html
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出
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[1]:http://xmodulo.com/add-kernel-boot-parameters-via-grub-linux.html
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@ -0,0 +1,64 @@
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Linux 有问必答：如何在Ubuntu或者Debian中启动进入命令行
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================================================================================
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> **提问**：我运行的是Ubuntu桌面，但是我希望启动后临时进入命令行。有什么简便的方法可以启动进入终端？
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Linux桌面自带了一个显示管理器（比如：GDM、KDM、LightDM），它们可以让计算机启动自动进入一个基于GUI的登录环境。然而，如果你要直接启动进入终端怎么办？ 比如，你在排查桌面相关的问题或者想要运行一个不需要GUI的发行程序。
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注意你可以通过按下Ctrl+Alt+F1到F6临时从桌面GUI切换到虚拟终端。然而，在本例中你的桌面GUI仍在后台运行，这不同于纯文本模式启动。
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在Ubuntu或者Debian桌面中，你可以通过传递合适的内核参数在启动时启动文本模式。
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### 启动临时进入命令行 ###
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如果你想要禁止桌面GUI并只有一次进入文本模式，你可以使用GRUB菜单。
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首先，打开你的电脑。当你看到初始的GRUB菜单时，按下‘e’。
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接着会进入下一屏，这里你可以修改内核启动选项。向下滚动到以“linux”开始的行，这里就是内核参数的列表。删除列表中的“quiet”和“splash”。在列表中添加“text”。
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升级的内核选项列表看上去像这样。按下Ctrl+x继续启动。这会一次性以详细模式启动控制台。
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永久启动进入命令行。
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如果你想要永久启动进入命令行，你需要[更新定义了内核启动参数GRUB设置][1]。
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在文本编辑器中打开默认的GRUB配置文件。
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$ sudo vi /etc/default/grub
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查找以GRUB_CMDLINE_LINUX_DEFAULT开头的行，并用“#”注释这行。这会禁止初始屏幕，而启动详细模式（也就是说显示详细的的启动过程）。
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更改GRUB_CMDLINE_LINUX="" 成：
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GRUB_CMDLINE_LINUX="text"
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接下来取消“#GRUB_TERMINAL=console”的注释。
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更新后的GRUB配置看上去像下面这样。
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最后，使用update-grub命令来基于这些更改重新生成/boot下的GRUB2配置文件。
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$ sudo update-grub
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这时，你的桌面应该从GUI启动切换到控制台启动了。可以通过重启验证。
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--------------------------------------------------------------------------------
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via: http://ask.xmodulo.com/boot-into-command-line-ubuntu-debian.html
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译者：[geekpi](https://github.com/geekpi)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出
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[1]:http://xmodulo.com/add-kernel-boot-parameters-via-grub-linux.html
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