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Is there a stopwatch, so that I can measure time taken for different commands for BASH shell?

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time [command] returns the time taken for the command to complete.

steven@wind:~$ time du /storage -s
du: cannot read directory `/storage/lost+found': Permission denied
1548584024      /storage

real    0m4.046s
user    0m0.224s
sys     0m1.496s
steven@wind:~$ time sleep 5

real    0m5.003s
user    0m0.000s
sys     0m0.000s
steven@wind:~$
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    Might be worth adding that (in bash,) time's output can be modified with the TIMEFORMAT variable. E.g. with the last example, TIMEFORMAT=%R; time sleep 5 would output just the real time in seconds; 5.003. And if you want to capture time's output, mywiki.wooledge.org/BashFAQ/032 explains how.
    – geirha
    Jun 20, 2013 at 18:57

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