Linux 使用init命令实现关机，重启，切换模式
<p><strong>Linux init命令 详解</strong></p>
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reboot可能是每个用过Linux的人都知道的命令，但有一个命令“init”才是命令中的精英。</p>
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最近有个同事学习安装了CentOS，明明安装的是带桌面的系统，但是启动后进入了命令行模式，搞不定了问到我，我执行了一下“init 5”，界面就出来了，那哥们顿时心生佩服，感觉好神奇。其实计算机这东西就是这样子，不会的就感觉好神奇，当你会了，也就是那么回事。</p>
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<strong>Linux有个文件 /etc/inittab</strong></p>
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<code class="bash comments"># inittab This file describes how the INIT process should set up </code>
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<code class="bash comments"># the system in a certain run-level. </code>
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<code class="bash comments"># </code>
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<code class="bash comments"># Author: Miquel van Smoorenburg, <miquels@drinkel.nl.mugnet.org> </code>
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<code class="bash comments"># Modified for RHS Linux by Marc Ewing and Donnie Barnes </code>
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<code class="bash comments"># </code>
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<code class="bash comments"># Default runlevel. The runlevels used by RHS are: </code>
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<code class="bash comments"># 0 - halt (Do NOT set initdefault to this) </code>
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<code class="bash comments"># 1 - Single user mode </code>
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<code class="bash comments"># 2 - Multiuser, without NFS (The same as 3, if you do not have networking) </code>
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<code class="bash comments"># 3 - Full multiuser mode </code>
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<code class="bash comments"># 4 - unused </code>
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<code class="bash comments"># 5 - X11 </code>
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<code class="bash comments"># 6 - reboot (Do NOT set initdefault to this) </code>
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<code class="bash comments">#</code>
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<code class="bash functions">id</code><code class="bash plain">:3:initdefault: </code>
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<strong>说明</strong></p>
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0是关机<br>
1是单用户<br>
2是多用户，不联网<br>
3是多用户<br>
4是不使用的<br>
5是xwindows，也就是有界面的<br>
6是重启</p>
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<strong>用法</strong></p>
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init命令很简单。直接输入init + 你想要的模式 回车就行。</p>
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比如 输入 ： init 0 就是关机</p>
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init 3 就是切换到多用户<br>
init 5 就是切换到界面<br>
init 6 就是重启</p>
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感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！</p>
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原文链接：http://blog.csdn.net/testcs_dn/article/details/53144412</p>
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