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How do you find the difference in time in bash?
Use unix time instead, date +%s , then subtract to get the difference in seconds.
How do I get the difference between two times in a shell script?
Really simple, take the number of seconds at the start, then take the number of seconds at the end, and print the difference in minutes:seconds. I was looking for a solution with seconds. Found here: How to calculate time difference in bash script?
How do you do math bash?
The recommended way to evaluate arithmetic expressions with integers in Bash is to use the Arithmetic Expansion capability of the shell. The builtin shell expansion allows you to use the parentheses ((…)) to do math calculations. The format for the Bash arithmetic expansion is $(( arithmetic expression )) .
How to calculate date and time in Bash?
Show Threads . Show Posts The GNU date command in full of goodies but not when it comes to calculate a date or time difference. Here is what I came up with after looking to more than one solution. Code should be self explaining.
How to get Unix time in milliseconds in Bash?
You may simply use %3N to truncate the nanoseconds to the 3 most significant digits (which then are milliseconds): This works e.g. on my Kubuntu 12.04 (Precise Pangolin). But be aware that %N may not be implemented depending on your target system.
How to write shell script to get the time difference?
Now I have .shtml file that is nothing but a shell script outputting some data to browser. What I want is time difference or time it took to execute a script. How do I write a shell script?
Which is faster to run GNU date or Perl?
The accepted answer works on linux or anything that can run gnu date, but not on several other UNIX flavors. Personally I find our older systems are much more likely to have perl than python, Node.js, Ruby or PHP. Yes, date +%s%3N (if available) is about 5x faster than perl).