blocks|key|101433|text|date+%2B%25s%25N返回秒数%2B当前纳秒。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|101434|因此，echo+$(($(date+%2B%25s%25N)/1000000))是您所需要的。|101435|示例：|101436|$+echo+$(($(date+%2B%25s%25N)/1000000))
1535546718115|code-block|syntax|javascript|101437|date+%2B%25s返回自纪元以来的秒数，如果有用的话。|101438|entityMap^0|0|A|0|3|V|0|0|0|0|8|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|@$9|W|A|X|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|Y|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|Z|8|@]|D|@]|E|$M|N]]|$1|O|3|P|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|R|$]]

<code>date +%s%N</code> returns the number of seconds + current nanoseconds.

Therefore, <code>echo $(($(date +%s%N)/1000000))</code> is what you need.

Example:

<pre><code>$ echo $(($(date +%s%N)/1000000))
1535546718115
</code></pre>

<code>date +%s</code> returns the number of seconds since the epoch, if that's useful.

blocks|key|318590|text|在date不支持%25N标志的OS+X上，我建议使用Homebrew安装coreutils。这将使您能够访问一个名为gdate的命令，该命令的行为与date在Linux系统上的行为类似。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|318591|brew+install+coreutils|code-block|syntax|javascript|318592|要获得更“原生”的体验，您可以随时将其添加到您的.bash_aliases中|318593|alias+date='gdate'|318594|然后执行|318595|$+date+%2B%25s%25N|318596|entityMap|0|LINK|mutability|MUTABLE|url|https://en.wikipedia.org/wiki/Homebrew_%2528package_management_software%2529^0|1|4|8|2|Y|9|1K|5|20|4|O|8|0|0|0|O|D|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@$9|11|A|12|B|C]|$9|13|A|14|B|C]|$9|15|A|16|B|C]|$9|17|A|18|B|C]|$9|19|A|1A|B|C]]|D|@$9|1B|A|1C|1|1D]]|E|$]]|$1|F|3|G|5|H|7|1E|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1F|8|@$9|1G|A|1H|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|1I|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|1J|8|@]|D|@]|E|$]]|$1|Q|3|R|5|H|7|1K|8|@]|D|@]|E|$I|J]]|$1|S|3|-4|5|6|7|1L|8|@]|D|@]|E|$]]]|T|$U|$5|V|W|X|E|$Y|Z]]]]

On OS X, where <code>date</code> does not support the <code>%N</code> flag, I recommend installing <code>coreutils</code> using <a href="https://en.wikipedia.org/wiki/Homebrew_%28package_management_software%29" rel="noreferrer">Homebrew</a>. This will give you access to a command called <code>gdate</code> that will behave as <code>date</code> does on Linux systems.

<pre><code>brew install coreutils
</code></pre>

For a more "native" experience, you can always add this to your <code>.bash_aliases</code>:

<pre><code>alias date='gdate'
</code></pre>

Then execute

<pre><code>$ date +%s%N
</code></pre>

blocks|key|101708|text|这是一个针对Linux的便携黑客，用于获取毫秒级的时间：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|101709|#!/bin/sh
read+up+rest+</proc/uptime;+t1="${up%25.*}${up#*.}"
sleep+3++++#+your+command
read+up+rest+</proc/uptime;+t2="${up%25.*}${up#*.}"

millisec=$((+10*(t2-t1)+))
echo+$millisec|code-block|syntax|javascript|101710|输出为：|101711|3010|101712|这是一个非常廉价的操作，适用于shell内部和procf。|101713|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Here is a somehow portable hack for Linux for getting time in milliseconds:

<pre><code>#!/bin/sh
read up rest &lt;/proc/uptime; t1="${up%.*}${up#*.}"
sleep 3 # your command
read up rest &lt;/proc/uptime; t2="${up%.*}${up#*.}"

millisec=$(( 10*(t2-t1) ))
echo $millisec
</code></pre>

The output is:

<pre><code>3010
</code></pre>

This is a very cheap operation, which works with shell internals and procfs.

blocks|key|101613|text|date命令在OS+X上没有提供毫秒，因此使用了python的别名|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|101614|millis(){++python+-c+"import+time;+print(int(time.time()*1000))";+}|code-block|syntax|javascript|101615|或|101616|alias+millis='python+-c+"import+time;+print(int(time.time()*1000))"'|101617|101618|编辑:跟随@CharlesDuffy的评论。派生任何子进程都需要额外的时间。|101619|$+time+date+%2B%25s%25N
1597103627N
date+%2B%25s%25N++0.00s+user+0.00s+system+63%25+cpu+0.006+total|101620|Python+is+still+improving+it's+VM+start+time，而且它没有预先编译的代码(如date)那么快。|101621|在我的机器上，大约需要30ms+-+60ms+(也就是date拍摄的6ms的5x-10x+)|101622|$+time+python+-c+"import+time;+print(int(time.time()*1000))"
1597103899460
python+-c+"import+time;+print(int(time.time()*1000))"++0.03s+user+0.01s+system+83%25+cpu+0.053+total|101623|我认为awk比python更轻量级，所以awk的取值范围是6ms到12ms+(即1倍到2倍的日期)：|101624|$+time+awk+'@load+"time";+BEGIN{print+int(1000+*+gettimeofday())}'
1597103729525
awk+'@load+"time";+BEGIN{print+int(1000+*+gettimeofday())}'++0.00s+user+0.00s+system+74%25+cpu+0.010+total|101625|entityMap|0|LINK|mutability|MUTABLE|url|https://bugs.python.org/issue34296^0|0|4|0|0|0|0|0|0|0|1N|4|0|18|0|0|R|4|0|0|3|3|7|6|K|3|0|0^^$0|@$1|2|3|4|5|6|7|1B|8|@$9|1C|A|1D|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|1E|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1F|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|1G|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|1H|8|@]|D|@]|E|$]]|$1|P|3|Q|5|6|7|1I|8|@]|D|@]|E|$]]|$1|R|3|S|5|H|7|1J|8|@]|D|@]|E|$I|J]]|$1|T|3|U|5|6|7|1K|8|@$9|1L|A|1M|B|C]]|D|@$9|1N|A|1O|1|1P]]|E|$]]|$1|V|3|W|5|6|7|1Q|8|@$9|1R|A|1S|B|C]]|D|@]|E|$]]|$1|X|3|Y|5|H|7|1T|8|@]|D|@]|E|$I|J]]|$1|Z|3|10|5|6|7|1U|8|@$9|1V|A|1W|B|C]|$9|1X|A|1Y|B|C]|$9|1Z|A|20|B|C]]|D|@]|E|$]]|$1|11|3|12|5|H|7|21|8|@]|D|@]|E|$I|J]]|$1|13|3|-4|5|6|7|22|8|@]|D|@]|E|$]]]|14|$15|$5|16|17|18|E|$19|1A]]]]

<code>date</code> command didnt provide milli seconds on OS X, so used an alias from python
<pre><code>millis(){ python -c &quot;import time; print(int(time.time()*1000))&quot;; }
</code></pre>
OR
<pre><code>alias millis='python -c &quot;import time; print(int(time.time()*1000))&quot;'
</code></pre>
<hr />
EDIT: following the comment from @CharlesDuffy.
Forking any child process takes extra time.
<pre><code>$ time date +%s%N
1597103627N
date +%s%N 0.00s user 0.00s system 63% cpu 0.006 total
</code></pre>
<a href="https://bugs.python.org/issue34296" rel="nofollow noreferrer">Python is still improving it's VM start time</a>, and it is not as fast as ahead-of-time compiled code (such as <code>date</code>).
On my machine, it took about 30ms - 60ms (that is 5x-10x of 6ms taken by <code>date</code>)
<pre><code>$ time python -c &quot;import time; print(int(time.time()*1000))&quot;
1597103899460
python -c &quot;import time; print(int(time.time()*1000))&quot; 0.03s user 0.01s system 83% cpu 0.053 total
</code></pre>
I figured <code>awk</code> is lightweight than <code>python</code>, so <code>awk</code> takes in the range of 6ms to 12ms (i.e. 1x to 2x of date):
<pre><code>$ time awk '@load &quot;time&quot;; BEGIN{print int(1000 * gettimeofday())}'
1597103729525
awk '@load &quot;time&quot;; BEGIN{print int(1000 * gettimeofday())}' 0.00s user 0.00s system 74% cpu 0.010 total
</code></pre>

blocks|key|101563|text|其他答案在大多数情况下可能就足够了，但当我在BusyBox系统上遇到问题时，我想我应该补充一下我的两点意见。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|101564|有问题的系统不支持%25N格式选项，也没有Python或Perl解释器。|style|CODE|101565|经过一番挠头之后，我们(谢谢Dave!)想出了这个：|101566|adjtimex+%7C+awk+'/(time.tv_sec%7Ctime.tv_usec):/+{+printf("%2506d",+$2)+}'|code-block|syntax|javascript|101567|它从adjtimex的输出中提取秒和微秒(通常用于设置系统时钟的选项)，并打印它们，而不显示新的行(以便它们粘合在一起)。请注意，微秒字段必须预先填充零，但这不会影响超过六位数的秒字段。因此，将微秒转换为毫秒应该是微不足道的。|101568|如果您需要一个尾随的新行(可能是因为它看起来更好)，那么尝试|101569|adjtimex+%7C+awk+'/(time.tv_sec%7Ctime.tv_usec):/+{+printf("%2506d",+$2)+}'+&&+printf+"\n"|101570|还要注意，这需要adjtimex和awk可用。如果不是，那么使用BusyBox，您可以使用以下命令在本地指向它们：|101571|ln+-s+/bin/busybox+./adjtimex
ln+-s+/bin/busybox+./awk|101572|然后将上面的代码调用为|101573|./adjtimex+%7C+./awk+'/(time.tv_sec%7Ctime.tv_usec):/+{+printf("%2506d",+$2)+}'|101574|当然，你也可以把它们放到你的PATH里|101575|编辑：|101576|上面的方法在我的BusyBox设备上也能用。在Ubuntu上，我尝试了同样的方法，发现adjtimex有不同的版本。在Ubuntu上，这可以输出以秒为单位的时间，小数位数到微秒(包括一个尾随的新行)|101577|sudo+apt-get+install+adjtimex
adjtimex+-p+%7C+awk+'/raw+time:/+{+print+$6+}'|101578|但在Ubuntu上我不会这么做。我会使用date+%2B%25s%25N|101579|entityMap|0|LINK|mutability|MUTABLE|url|https://en.wikipedia.org/wiki/BusyBox^0|M|7|0|0|9|2|0|0|0|2|8|0|0|0|8|8|H|3|0|0|0|0|E|4|0|0|17|8|0|0|K|A|0^^$0|@$1|2|3|4|5|6|7|1K|8|@]|9|@$A|1L|B|1M|1|1N]]|C|$]]|$1|D|3|E|5|6|7|1O|8|@$A|1P|B|1Q|F|G]]|9|@]|C|$]]|$1|H|3|I|5|6|7|1R|8|@]|9|@]|C|$]]|$1|J|3|K|5|L|7|1S|8|@]|9|@]|C|$M|N]]|$1|O|3|P|5|6|7|1T|8|@$A|1U|B|1V|F|G]]|9|@]|C|$]]|$1|Q|3|R|5|6|7|1W|8|@]|9|@]|C|$]]|$1|S|3|T|5|L|7|1X|8|@]|9|@]|C|$M|N]]|$1|U|3|V|5|6|7|1Y|8|@$A|1Z|B|20|F|G]|$A|21|B|22|F|G]]|9|@]|C|$]]|$1|W|3|X|5|L|7|23|8|@]|9|@]|C|$M|N]]|$1|Y|3|Z|5|6|7|24|8|@]|9|@]|C|$]]|$1|10|3|11|5|L|7|25|8|@]|9|@]|C|$M|N]]|$1|12|3|13|5|6|7|26|8|@$A|27|B|28|F|G]]|9|@]|C|$]]|$1|14|3|15|5|6|7|29|8|@]|9|@]|C|$]]|$1|16|3|17|5|6|7|2A|8|@$A|2B|B|2C|F|G]]|9|@]|C|$]]|$1|18|3|19|5|L|7|2D|8|@]|9|@]|C|$M|N]]|$1|1A|3|1B|5|6|7|2E|8|@$A|2F|B|2G|F|G]]|9|@]|C|$]]|$1|1C|3|-4|5|6|7|2H|8|@]|9|@]|C|$]]]|1D|$1E|$5|1F|1G|1H|C|$1I|1J]]]]

The other answers are probably sufficient in most cases but I thought I'd add my two cents as I ran into a problem on a <a href="https://en.wikipedia.org/wiki/BusyBox" rel="nofollow noreferrer">BusyBox</a> system.

The system in question did not support the <code>%N</code> format option and doesn't have no Python or Perl interpreter.

After much head scratching, we (thanks Dave!) came up with this:

<pre><code>adjtimex | awk '/(time.tv_sec|time.tv_usec):/ { printf("%06d", $2) }'
</code></pre>

It extracts the seconds and microseconds from the output of <code>adjtimex</code> (normally used to set options for the system clock) and prints them without new lines (so they get glued together). Note that the microseconds field has to be pre-padded with zeros, but this doesn't affect the seconds field which is longer than six digits anyway. From this it should be trivial to convert microseconds to milliseconds.

If you need a trailing new line (maybe because it looks better) then try

<pre><code>adjtimex | awk '/(time.tv_sec|time.tv_usec):/ { printf("%06d", $2) }' &amp;&amp; printf "\n"
</code></pre>

Also note that this requires <code>adjtimex</code> and <code>awk</code> to be available. If not then with BusyBox you can point to them locally with:

<pre><code>ln -s /bin/busybox ./adjtimex
ln -s /bin/busybox ./awk
</code></pre>

And then call the above as

<pre><code>./adjtimex | ./awk '/(time.tv_sec|time.tv_usec):/ { printf("%06d", $2) }'
</code></pre>

Or of course you could put them in your <code>PATH</code>

EDIT:

The above worked on my BusyBox device. On Ubuntu I tried the same thing and realised that <code>adjtimex</code> has different versions. On Ubuntu this worked to output the time in seconds with decimal places to microseconds (including a trailing new line)

<pre><code>sudo apt-get install adjtimex
adjtimex -p | awk '/raw time:/ { print $6 }'
</code></pre>

I wouldn't do this on Ubuntu though. I would use <code>date +%s%N</code>

blocks|key|101794|text|纯bash解决方案|type|unstyled|depth|inlineStyleRanges|entityRanges|data|101795|从bash+5.0+(released+on+7+Jan+2019)开始，您可以使用内置变量EPOCHREALTIME，该变量包含自纪元以来的秒数，包括精确到微秒(μs)精度的小数位(echo+$EPOCHREALTIME打印类似1547624774.371215的内容)。通过删除.和最后三个位置，我们得到毫秒数：|offset|length|style|CODE|101796|要么使用|101797|((+t+=+${EPOCHREALTIME/./}+/+1000+))|code-block|syntax|javascript|101798|或者类似于|101799|t=${EPOCHREALTIME/./}
t=${t%25???}|101800|无论哪种方式，t都将类似于1547624774371。|101801|entityMap|0|LINK|mutability|MUTABLE|url|https://lists.gnu.org/archive/html/info-gnu/2019-01/msg00010.html^0|0|1|4|1A|D|2K|J|37|H|3X|1|B|M|0|0|0|0|0|0|7|1|D|D|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|13|8|@$D|14|E|15|F|G]|$D|16|E|17|F|G]|$D|18|E|19|F|G]|$D|1A|E|1B|F|G]|$D|1C|E|1D|F|G]]|9|@$D|1E|E|1F|1|1G]]|A|$]]|$1|H|3|I|5|6|7|1H|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|1I|8|@]|9|@]|A|$M|N]]|$1|O|3|P|5|6|7|1J|8|@]|9|@]|A|$]]|$1|Q|3|R|5|L|7|1K|8|@]|9|@]|A|$M|N]]|$1|S|3|T|5|6|7|1L|8|@$D|1M|E|1N|F|G]|$D|1O|E|1P|F|G]]|9|@]|A|$]]|$1|U|3|-4|5|6|7|1Q|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11]]]]

<h1>Pure bash solution</h1>
Since <code>bash</code> 5.0 (<a href="https://lists.gnu.org/archive/html/info-gnu/2019-01/msg00010.html" rel="nofollow noreferrer">released on 7 Jan 2019</a>) you can use the built-in variable <code>EPOCHREALTIME</code> which contains the seconds since the epoch, including decimal places down to micro-second (μs) precision (<code>echo $EPOCHREALTIME</code> prints something like <code>1547624774.371215</code>). By removing the <code>.</code> and the last three places we get milliseconds:
Either use
<pre><code>(( t = ${EPOCHREALTIME/./} / 1000 ))
</code></pre>
or something like
<pre><code>t=${EPOCHREALTIME/./}
t=${t%???}
</code></pre>
Either way <code>t</code> will be something like <code>1547624774371</code>.

blocks|key|101661|text|我只是想向Alper's+answer添加我必须做的事情来让这个东西工作：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|101662|在Mac上，你需要brew+install+coreutils，所以我们可以使用gdate。否则，在Linux上，它就是date。此函数将帮助您为命令计时，而不必创建临时文件或其他任何东西：|style|CODE|101663|function+timeit()+{
++++start=`gdate+%2B%25s%25N`
++++bash+-c+$1
++++end=`gdate+%2B%25s%25N`
++++runtime=$(((end-start)/1000000000.0))
++++echo+"+seconds"
}|code-block|syntax|javascript|101664|您可以将其与字符串一起使用：|101665|timeit+'tsc+--noEmit'|101666|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/16548528/command-to-get-time-in-milliseconds/16548827#16548827^0|5|E|0|0|9|M|14|5|1O|4|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@$A|Z|B|10|1|11]]|C|$]]|$1|D|3|E|5|6|7|12|8|@$A|13|B|14|F|G]|$A|15|B|16|F|G]|$A|17|B|18|F|G]]|9|@]|C|$]]|$1|H|3|I|5|J|7|19|8|@]|9|@]|C|$K|L]]|$1|M|3|N|5|6|7|1A|8|@]|9|@]|C|$]]|$1|O|3|P|5|J|7|1B|8|@]|9|@]|C|$K|L]]|$1|Q|3|-4|5|6|7|1C|8|@]|9|@]|C|$]]]|R|$S|$5|T|U|V|C|$W|X]]]]

I just wanted to add to <a href="https://stackoverflow.com/questions/16548528/command-to-get-time-in-milliseconds/16548827#16548827">Alper's answer</a> what I had to do to get this stuff working:

On Mac, you'll need <code>brew install coreutils</code>, so we can use <code>gdate</code>. Otherwise on Linux, it's just <code>date</code>. And this function will help you time commands without having to create temporary files or anything:

<pre><code>function timeit() {
 start=`gdate +%s%N`
 bash -c $1
 end=`gdate +%s%N`
 runtime=$(((end-start)/1000000000.0))
 echo " seconds"
}
</code></pre>

And you can use it with a string:

<pre><code>timeit 'tsc --noEmit'
</code></pre>

blocks|key|318543|text|如下所示的Python脚本：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|318544|import+time
cur_time+=+int(time.time()*1000)|code-block|syntax|javascript|318545|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

A Python script like this:

<pre><code>import time
cur_time = int(time.time()*1000)
</code></pre>

blocks|key|318795|text|Perl可以用于此目的，即使在像AIX这样的陌生平台上也是如此。示例：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|318796|#!/usr/bin/perl+-w

use+strict;
use+Time::HiRes+qw(gettimeofday);

my+($t_sec,+$usec)+=+gettimeofday+();
my+$msec=+int+($usec/1000);

my+($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst)+=
++++localtime+($t_sec);

printf+"%2504d-%2502d-%2502d+%2502d:%2502d:%2502d+%2503d\n",
++++1900%2B$year,+1%2B$mon,+$mday,+$hour,+$min,+$sec,+$msec;|code-block|syntax|javascript|318797|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Perl can be used for this, even on exotic platforms like AIX. Example:

<pre><code>#!/usr/bin/perl -w

use strict;
use Time::HiRes qw(gettimeofday);

my ($t_sec, $usec) = gettimeofday ();
my $msec= int ($usec/1000);

my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) =
 localtime ($t_sec);

printf "%04d-%02d-%02d %02d:%02d:%02d %03d\n",
 1900+$year, 1+$mon, $mday, $hour, $min, $sec, $msec;
</code></pre>

blocks|key|318930|text|我希望从bash生成值，并在Java代码中使用该值将其转换回日期(java.util)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|318931|下面的命令适用于我在bash文件中生成值：|318932|date+%2B%25s000|offset|length|style|CODE|318933|entityMap^0|0|0|0|B|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|N|8|@$F|O|G|P|H|I]]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|K|$]]

I want to generate value from bash and use that value in Java code to convert back to date(java.util).
Following command works for me to generate the value in bash file:
<code>date +%s000</code>

问命令获取以毫秒为单位的时间
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回答 10

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