blocks|key|314099|text|在Ubuntu14.10及更高版本上，sudo是必需的。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|314100|15.04中介绍的Systemd改变了Ubuntu处理shutdown和reboot的方式：|314101|当一个用户登录时，sudo是不必要的。当多个用户登录时，就需要sudo。|ordered-list-item|314102|应用程序可以抑制shutdown和reboot。你用sudo推翻了这些抑制。|314103|通过ssh登录的单个用户仍然需要sudo。|entityMap^0|J|4|0|R|8|10|6|0|9|4|V|4|0|8|8|H|6|Q|4|0|2|3|G|4^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|X|8|@$9|Y|A|Z|B|C]|$9|10|A|11|B|C]]|D|@]|E|$]]|$1|K|3|L|5|J|7|12|8|@$9|13|A|14|B|C]|$9|15|A|16|B|C]|$9|17|A|18|B|C]]|D|@]|E|$]]|$1|M|3|N|5|J|7|19|8|@$9|1A|A|1B|B|C]|$9|1C|A|1D|B|C]]|D|@]|E|$]]]|O|$]]

On Ubuntu 14.10 and older, <code>sudo</code> is required.

The introduction of Systemd in 15.04 changed the way Ubuntu handles <code>shutdown</code> and <code>reboot</code>:

<ol>
<li>When a single user is logged in, <code>sudo</code> isn't necessary. When more than one user is logged in then <code>sudo</code> is required.</li>
<li>Applications can inhibit <code>shutdown</code> and <code>reboot</code>. You override these inhibitions with <code>sudo</code>.</li>
<li>A single user logged in via <code>ssh</code> still requires <code>sudo</code>.</li>
</ol>

blocks|key|311814|text|在我的14.04机器上，当我(作为一个普通用户)输入reboot时，我得到|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|311815|reboot:+Need+to+be+root|code-block|syntax|javascript|311816|这就是不同之处。|311817|正如特伦斯在评论中指出的那样，它在后期系统上的工作方式与我的不同。因此，您可能会看到旧的写件和/或用户(像我一样)已经习惯于输入sudo+reboot！|entityMap|0|LINK|mutability|MUTABLE|url|https://askubuntu.com/users/231142/terrance^0|Q|6|0|0|0|1S|B|2|3|0^^$0|@$1|2|3|4|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Z|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@$9|13|A|14|1|15]]|E|$]]]|O|$P|$5|Q|R|S|E|$T|U]]]]

On my 14.04 machine, when I (as a normal user) type <code>reboot</code>, I get

<pre><code>reboot: Need to be root
</code></pre>

That is the difference.

As <a href="https://askubuntu.com/users/231142/terrance">Terrance</a> pointed out in the comments, it works differently on later systems than mine. So you are probably seeing old writeups and/or users (like me) who have been habituated to typing <code>sudo reboot</code>!

blocks|key|314208|text|由于兼容性原因，sudo+reboot在教程/说明中使用。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|314209|而reboot可能会起作用|314210|如果你是根或者|unordered-list-item|314211|如果您在主机上使用systemd和|314212|如果没有应用程序阻止重新启动|314213|sudo+reboot将“始终”工作，不管|314214|不管你是根|314215|是否有其他用户登录|314216|是否存在应用程序阻塞|314217|无论是init系统，系统V，Upstart，不管是什么|314218|*嗯，它肯定会尝试--除非有一些内核进程阻塞/不正确地运行它。|entityMap^0|8|B|0|1|6|0|0|9|7|0|0|0|B|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@$9|12|A|13|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|14|8|@$9|15|A|16|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|17|8|@]|D|@]|E|$]]|$1|K|3|L|5|J|7|18|8|@$9|19|A|1A|B|C]]|D|@]|E|$]]|$1|M|3|N|5|J|7|1B|8|@]|D|@]|E|$]]|$1|O|3|P|5|6|7|1C|8|@$9|1D|A|1E|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|J|7|1F|8|@]|D|@]|E|$]]|$1|S|3|T|5|J|7|1G|8|@]|D|@]|E|$]]|$1|U|3|V|5|J|7|1H|8|@]|D|@]|E|$]]|$1|W|3|X|5|J|7|1I|8|@]|D|@]|E|$]]|$1|Y|3|Z|5|6|7|1J|8|@]|D|@]|E|$]]]|10|$]]

<code>sudo reboot</code>is used in tutorials / how-tos for compatibility reasons

While <code>reboot</code> might work

<ul>
<li>if you are root or </li>
<li>if you are on a host with <code>systemd</code> and </li>
<li>if no applications are blocking a reboot</li>
</ul>

<code>sudo reboot</code> will "always"* work, regardless of

<ul>
<li>whether you are root</li>
<li>whether there are other users logged in</li>
<li>whether there are applications blocking</li>
<li>whether init is systemd, System V, Upstart, whatever</li>
</ul>

* Well, it will certainly try - short of there being some kernel processes that are blocking/misbehaving it should work.

blocks|key|314024|text|对于我自己来说，如果我多次输入reboot，它就不会让我在观看YouTube和其他打开的标签时使用Chrome的抑制剂。所以我不得不用sudo+reboot--一个更大的锤子。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|314025|Ubuntu+16.04版|entityMap^0|F|6|1V|B|0^^$0|@$1|2|3|4|5|6|7|I|8|@$9|J|A|K|B|C]|$9|L|A|M|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|N|8|@]|D|@]|E|$]]]|H|$]]

For myself many times if I type <code>reboot</code> it won't let me due to inhibitors from Chrome when watching YouTube and other opened tabs. So I'm forced to use <code>sudo reboot</code>--a bigger hammer.

This in Ubuntu 16.04

blocks|key|311975|text|谢谢你的讨论，我现在很高兴明白这一点！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|311976|正如特伦斯所提到的，在15.04版本中，它们从Upstart切换到Systemd以获取命令。此更改意味着reboot不再需要根权限。|offset|length|style|CODE|311977|至于*nix社区为什么指示sudo+reboot，有几个潜在的原因：|311978|习惯-人们习惯于不得不用sudo+reboot来重新启动，他们继续这样做，尽管它是不需要的。|unordered-list-item|311979|未更新的用户-指示sudo+reboot的人在Ubuntu的版本中低于15.04，或者其他发行版使用Upstart命令。|311980|兼容性--对我来说，这似乎是最可信的:人们对sudo+reboot进行指导，因为无论发生什么，它都能在所有*nix系统上重新启动。|311981|附加说明:来自user535733's+回答的报道：|311982|15.04系统的引入改变了Ubuntu处理关闭和重新启动的方式：|blockquote|311983|当一个用户登录时，sudo是不必要的。当多个用户登录时，就需要sudo。|ordered-list-item|311984|应用程序可以阻止关闭和重新启动。你用sudo推翻了这些抑制。|entityMap|0|LINK|mutability|MUTABLE|url|https://askubuntu.com/users/231142/terrance|1|https://askubuntu.com/users/19626/user535733|2|https://askubuntu.com/a/1005914/791697^0|0|1G|6|2|3|0|0|D|B|0|C|B|0|9|B|0|M|B|0|7|A|1|K|2|2|0|0|9|4|V|4|0|I|4^^$0|@$1|2|3|4|5|6|7|1B|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1C|8|@$D|1D|E|1E|F|G]]|9|@$D|1F|E|1G|1|1H]]|A|$]]|$1|H|3|I|5|6|7|1I|8|@$D|1J|E|1K|F|G]]|9|@]|A|$]]|$1|J|3|K|5|L|7|1L|8|@$D|1M|E|1N|F|G]]|9|@]|A|$]]|$1|M|3|N|5|L|7|1O|8|@$D|1P|E|1Q|F|G]]|9|@]|A|$]]|$1|O|3|P|5|L|7|1R|8|@$D|1S|E|1T|F|G]]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1U|8|@]|9|@$D|1V|E|1W|1|1X]|$D|1Y|E|1Z|1|20]]|A|$]]|$1|S|3|T|5|U|7|21|8|@]|9|@]|A|$]]|$1|V|3|W|5|X|7|22|8|@$D|23|E|24|F|G]|$D|25|E|26|F|G]]|9|@]|A|$]]|$1|Y|3|Z|5|X|7|27|8|@$D|28|E|29|F|G]]|9|@]|A|$]]]|10|$11|$5|12|13|14|A|$15|16]]|17|$5|12|13|14|A|$15|18]]|19|$5|12|13|14|A|$15|1A]]]]

Thanks for the discussion, I'm glad to understand this now! 

As <a href="https://askubuntu.com/users/231142/terrance">Terrance</a> mentioned, in version 15.04, they switched from Upstart to Systemd for the commands. This change means that <code>reboot</code> no longer requires root privileges. 

As for why the *nix community instructs to <code>sudo reboot</code>, there are a few potential reasons:

<ul>
<li>Habit - People were so used to having to <code>sudo reboot</code> to reboot, they continue to do it despite the fact it is not needed</li>
<li>Non-updated users - The people instructing to <code>sudo reboot</code> are on versions of Ubuntu lower than 15.04, or other distros that use Upstart for commands. </li>
<li>Compatibility - This is what seems the most plausible to me: people are instructing to <code>sudo reboot</code> because it is guaranteed to reboot across all *nix systems, no matter what. </li>
</ul>

Additional note: from <a href="https://askubuntu.com/users/19626/user535733">user535733</a>'s <a href="https://askubuntu.com/a/1005914/791697">answer</a>:

<blockquote>
 The introduction of systemd in 15.04 changed the way Ubuntu handles
 shutdown and reboot:
 
 <ol>
 <li>When a single user is logged in, <code>sudo</code> isn't necessary. When more than one user is logged in, then <code>sudo</code> is required.</li>
 <li>Applications can inhibit shutdown and reboot. You override these inhibitions with <code>sudo</code>.</li>
 </ol>
</blockquote>

I recently found out that <code>reboot</code> works just as well as <code>sudo reboot</code>, from what I can tell. However, in a lot of instances, I see people saying to <code>sudo reboot</code>. Why is this? Are they the same, and just personal preference? Or are they different? Does <code>sudo reboot</code> do more than <code>reboot</code>?

`sudo reboot` vs `reboot` - what is the difference?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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据我所知，我最近发现reboot的工作效果和sudo reboot一样好。然而，在很多情况下，我看到人们对sudo reboot说。为什么会这样呢？它们是一样的，只是个人偏好吗？或者他们不一样？sudo reboot比reboot做的更多吗？

问‘`sudo reboot` vs’reboot`‘--有什么区别？
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