blocks|key|356064|text|sudo应该放在最后，这样nohup和nice就不会以root权限运行。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|356065|所以后者|356066|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

the sudo should go last so that nohup and nice aren't running with root privileges.

so the latter

blocks|key|3139855|text|~+$+sudo+nohup+nice+whoami
nohup:+ignoring+input+and+appending+output+to+`nohup.out'
~+$+sudo+cat+nohup.out+
root|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3139856|第一种方法和第二种方法之间的区别在于谁拥有nohup.out文件。sudo首先会让它归超级用户所有，然后nohup才会让它归你的用户所有。|unstyled|offset|length|style|CODE|3139857|entityMap^0|0|X|4|1G|5|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|N|8|@$G|O|H|P|I|J]|$G|Q|H|R|I|J]]|9|@]|A|$]]|$1|K|3|-4|5|F|7|S|8|@]|9|@]|A|$]]]|L|$]]

<pre><code>~ $ sudo nohup nice whoami
nohup: ignoring input and appending output to `nohup.out'
~ $ sudo cat nohup.out 
root
</code></pre>

The difference between the first and second way you've done it is who owns the nohup.out file. <code>sudo</code> first will make it owned by root, <code>nohup</code> before sudo will make it owned by your user.

blocks|key|355285|text|我猜他们都做了一个exec*+syscall来把球传给下一个，所以，不管是什么顺序，它都不会留下任何挂起的进程。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|355286|我会说nohup应该是最后一个，这样其他两个就不会关闭信号处理程序。(我敢肯定nice不会处理信号，但sudo会。)|355287|然后，sudo和nice，这完全取决于您希望用nice改变调度优先级的方式。|355288|355289|如果您想要提高优先级(即，将负值设置为)，请在sudo之前执行。|unordered-list-item|355290|如果您想降低优先级(将nice设置为正值)，请在sudo之前执行此操作，因为您不需要超级用户权限。|355291|355292|355293|entityMap^0|0|0|0|0|1|1|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]|$1|G|3|H|5|I|7|T|8|@]|9|@]|A|$]]|$1|J|3|K|5|I|7|U|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|V|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|W|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|O|$]]

I guess all of them do an exec* syscall to pass the ball to the next one, so, whatever the order, it won't leave any hanging processes.

I'd say that nohup should be last so that the two other don't clober the signal handler. (I'm sure nice does not play with signals, but sudo does.)

Then, sudo and nice, it all depends on which way you want to alter the scheduling priority with nice.

<ul>
<li>If you want to raise the priority (that is, give a negative value to nice) do sudo before.</li>
<li>If you want to lower the priority (give nice a positive value) do it before sudo, as you don't need root privileges.</li>
</ul>

blocks|key|3139909|text|sudo可能不会尊重友善。至少在我的机器(Ubuntu+9.04)上没有。运行以下命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3139910|nice+sudo+nice
sudo+nice+nice|code-block|syntax|javascript|3139911|打印0和10。(请注意，不带任何命令的'nice‘将打印当前的niceness。)|3139912|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

sudo may not respect niceness. At least, it doesn't on my machine (Ubuntu 9.04). Running this:

<pre><code>nice sudo nice
sudo nice nice
</code></pre>

prints out 0 and 10. (Note that 'nice' with no command prints out the current niceness.)

blocks|key|3139924|text|如果需要负的niceness，我会这样做:+sudo+nohup+nice命令，因为根据‘`info+coreutils’nohup应该在nice值之前。如果我想要一个负的nice值，sudo必须在前面，因为只有root才能使用负的nice值。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3139925|如果需要正确率，我会简单地执行:+nohup+nice命令这可以确保nohup和nice不是以root权限运行的。|3139926|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

If negative niceness is desired, I would do:
sudo nohup nice command
because according to `info coreutils' nohup should preceed nice. If I want a negative nice value, sudo must come before, since only root is able to use negative nice values.

If positive niceness is desired, I would do simply:
nohup nice sudo command
This ensures that nohup and nice are not run with root privileges.

blocks|key|355305|text|不同意的其他答案。我建议：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|355306|sudo+nohup+nice+foo.sh|CODE|355307|我观察到nohup+sudo+#+--+ie+nohup并不总是转移到sudo的子子进程(这是Ubuntu上某些/etc/init.d脚本委托给其他脚本的)。不知道为什么，当然令人惊讶，但情况确实如此，并花了很长时间进行调试。|355308|(我注意到其他人报告没有通过，所以最好把它放在最后…尽管如果对你的操作系统有疑问，早点放好，因为好的不生效通常比没有生效的问题要小！)|355309|请注意，sudo+nohup将nohup.out保留为超级用户所有，如前所述，但这是通过以下命令修复的：|355310|sudo+nohup+nice+foo.sh+>>+/tmp/foo.stdout.log+2>>+/tmp/foo.stderr.log|355311|entityMap^0|0|3|0|0|M|0|4|A|0|0|4|A|0|0|1X|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|V|8|@$9|W|A|X|B|H]]|D|@]|E|$]]|$1|I|3|J|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|K|3|L|5|6|7|11|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|12|8|@$9|13|A|14|B|C]]|D|@]|E|$]]|$1|O|3|P|5|6|7|15|8|@$9|16|A|17|B|H]]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|18|8|@]|D|@]|E|$]]]|R|$]]

Disagree with other answers. I recommend:

<code>sudo nohup nice foo.sh</code>

I have observed nohup sudo #fail -- ie nohup is not always transferred to sudo'd sub-sub-processes (this was for certain /etc/init.d scripts on Ubuntu which delegated to yet other scripts). Not sure why, certainly surprising, but was the case and took a good wee while to debug.

(I note others report niceness not being passed through, so seems best to put it last ... although if in doubt on your OS put nice earlier, because nice not taking effect is usually less of a problem than nohup not taking effect!)

Note that sudo nohup leaves nohup.out owned by root, also as has been mentioned, but that's fixed with a:

<code>sudo nohup nice foo.sh &gt;&gt; /tmp/foo.stdout.log 2&gt;&gt; /tmp/foo.stderr.log</code>

So I have a script that I want to run as root, without hangup and nicely. What order should I put the commands in?

sudo nohup nice foo.bash &amp;

or

nohup nice sudo foo.bash &amp;

etc.

I suspect it doesn't matter but would like some insight from those who really know.

sudo nohup nice <-- in what order?

Ubuntu

所以我有一个脚本，我想以root用户的身份运行，不会挂起，而且运行得很好。我应该按什么顺序放入命令？sudo nohup很好的foo.bash &或nohup很棒的sudo foo.bash &等。我怀疑这无关紧要，但我想从那些真正了解的人那里获得一些见解。

问sudo nohup nice <--按什么顺序？
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