It only takes a minute to sign up. I'm using Linux. Or you can just convert everything into miliseconds from this formula :. Edit : If there is a leading zero in one of the variables the script will fail.
I added 10 in front of the variable names, to strip the leading zeros, so that we get, for example, 8 instead of Sign up to join this community. The best answers are voted up and rise to the top. Millisecond time in a shell script Ask Question. Asked 4 years, 2 months ago. Active 4 years, 2 months ago.
Viewed 4k times. Gilles 'SO- stop being evil' k gold badges silver badges bronze badges. RajuBhai RajuBhai 2 2 silver badges 9 9 bronze badges. Are you interested in the entire wall clock run-time for programs started by the shell or are you interested in the time-of day-value with millisecond granularity?
If you are looking for a portable method, then the answer is: no, there is no way to do that.
Bash time difference milliseconds
If you are on linux only, you may use date. Active Oldest Votes. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. The Overflow Checkboxland. Tales from documentation: Write for your dumbest user. Featured on Meta. Feedback post: New moderator reinstatement and appeal process revisions.
The new moderator agreement is now live for moderators to accept across the…. Linked 0.You can use date command on Linux shell script to get current Date and Time.
The date command is the part of the Linux Coreutils package. This tutorial will help you to get the current date and time in a shell script. Simple date command returns the current date and time with the current timezone set in your system.
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Epoch & Unix Timestamp Conversion Tools
You can install coreutils including gnu-datethen you will have a version of date that supports milliseconds. To install these tools using Homebrew run this oneliner in your terminal:. Homebrew is now installed it is wise to follow the installer's suggestions after installation. Now we will install coreutils using brew.
As the installation says, all commands have been installed with the prefix 'g' e. If you want milliseconds output, you can use the following command, although the output is just corrected by appending zeros rather than adding precision due to the aforementioned reason. The following does output correct milliseconds on systems which support the necessary precision. Source for above command: Unix. SE — How to get milliseconds since Unix epoch.
Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. In general, every field of the date command's format can be given an optional field width. Hence, we can use the three first characters of nanoseconds to get the milliseconds:.
This will give you access to a command called gdate that will behave as date does on Linux systems. 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 BusyBox system. It extracts the seconds and microseconds from the output of adjtimex 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. Also note that this requires adjtimex and awk to be available.
If not then with BusyBox you can point to them locally with:. The above worked on my BusyBox device. On Ubuntu I tried the same thing and realised that adjtimex has different versions. On Ubuntu this worked to output the time in seconds with decimal places to microseconds including a trailing new line. I just wanted to add to Alper's answer what I had to do to get this stuff working:.
On Mac, you'll need brew install coreutilsso we can use gdate. Otherwise on Linux, it's just date. And this function will help you time commands without having to create temporary files or anything:. The returned time should have sub-second precisionbut the actual precision may vary based on the platform.
Server Fault is a question and answer site for system and network administrators. It only takes a minute to sign up. How do I get the current Unix time in milliseconds i.
This works e. For the people that suggest running external programs to get the milli seconds Point being: before picking any answer from here, please keep in mind that not all programs will run under one whole second. If you are looking for a way to display the length of time your script ran, the following will provide a not completely accurate result:.
There are lots more! But we need to keep in mind that it takes around 30 milliseconds to run. We can cut it to the scale of 2 digits fraction, and at the very beginning compute the average overhead of reading the time, and then remove it off the measurement. Here is an example:. Not adding anything revolutionary here over the accepted answer, but just to make it reusable easily for those of you whom are newer to Bash.
Update: Another alternative in pure Bash that works only with Bash 4. It will definitely be faster, because no processes are forked off the main one. See man strftime for supported options. Also see man bash to see printf syntax. I realise this does not give milliseconds since epoch, but it might still be useful as an answer for some of the cases, it all depends on what you need it for really, multiply by if you need a millisecond number :D.
Simplest way would be to make a small executable from C f. Perl requires Time::Format module. Perhaps it is not the best CPAN module to use, but it gets the job done.
Time::Format is generally made available with distributions. If you want a simple shell elapsed computation, this is easy and portable, using Frank Thonig's answer :. For Alpine Linux many Docker images and possibly other minimal Linux environments, you can abuse adjtimex :.
With awk you can get the microseconds, and with head you can use the first 3 digits only. Note: Shamelessly stolen from this answer.Print the date and time in various formats using the Linux command date. Use any combination of the above switches after the plus symbol to output the date as you so wish.
If you want to add spaces you can use quotes around the date. If you are in the UK you will notice that instead of showing "" as the time it will show "" as the time. View the RFC date for your computer using the following command:. Do you want to know the date next Monday? Try this:. Using the same command you can find out which day of the week your birthday or Christmas falls upon.
It is worth checking out the manual page for the date command using the following command:. Linux Switching from Windows. Tweet Share Email.
To display the date, type:. By default the output will be something like this:.
Wed Apr 20 BST Display the date using any or all of the following elements:. To display just the time use the following:. Alternatively, use the following:. Attach the date, as well, using the command:. View the UTC date for your computer using the following command:.
How to Get Current Date and Time in Bash Script
This displays the date in the following format:. This flag is useful as it shows that you are an hour ahead of GMT. The -d basically prints a date in the future. The result is Sun Dec More from Lifewire.If you want to get a better, more accurate timing, execute the Compute time-difference on millisecond level.
It would seem that we could use "ms" instead of the "s" parameter and avoid division bysince the data are stored in milliseconds in mycolumn. Hi All, I have one file which contains time for request and response. Higher bound of the time interval whose length is calculated. In the below calculator enter the start time and the end time in the format H:M:S or Seconds and click calculate to know the difference between the given times in hours, minutes and seconds.
Use an easier format to manually enter times with milliseconds. Returns the number of milliseconds passed since the Arduino board began running the current program. Then use bc or awk to compute the difference since bash itself does not manage floating point numbers.
I have a scenario whereby an application has captured the start timestamp on a file in the format of when the application services started up.
Strip 'GMT' to convert to local time. Both and represent the same second, but is exactlywhile has milliseconds more, not enough to make a second and appear in the timestamp. If you want something that is platform independent and uses only actually TimerInit does not really return a time stamp in milliseconds, but rather an "internal" number. Has anybody have a sample C script code in Unix to display time with milliseconds?
Most of the research I'm doing is up to the seconds format only. TimeMem is a much newer application that is ported from the Unix time utility. Take care, under windows, the prcision will be less than under unix : I want to get the current time in milliseconds and store that result in number format.
Please help me. Hi, A column in my table has an unix time in milliseconds. Leap seconds are ignored, with a leap second having the same Unix time as the second before it, and every day is treated as A little note in Portfolio magazine caught my attention: On Friday, February 13, atthe Unix time value with be To get the difference in another unit of measurement, pass that measurement as the second argument.
Use the following script to get time difference in hours, minutes, seconds and milliseconds in SQL Server. Since your timestamp value seemed way too far into the future, I assumed that in your case you had milliseconds.
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