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The sleep command is a useful way to add pauses in your Bash script. Note that to achieve the same result on a MacOS or BSD machine, you would run the equivalent command sleep 150, as 2 minutes and 30 seconds is equal to 150 seconds. If there are two or more numbers included, the system will wait for the amount of time equivalent to the sum of those numbers.įor example, sleep 2m 30s will create a pause of 2 and a half minutes. It is also possible to use more than one argument with the sleep command. Other Unix-like operating systems will likely support the following units of time: On some types of machines (namely BSD systems and MacOS,) the only unit of time supported is seconds.
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Sleep's default unit of time is seconds, which is why we don't have to specify a unit in the examples above. That's it for the basic usage of the sleep command! What to Keep in Mind When Using the Sleep Command Similarly, you could use a floating point number to represent fractions of seconds. The result of this script will look like this: This will pause your script for N seconds, with N being either a positive integer or a floating point number.Ĭonsider this basic example: echo "Hello there!"Įcho "Oops! I fell asleep for a couple seconds!" Sleep is a very versatile command with a very simple syntax. To do this, you can use the very straightforward sleep command. For example, you might want the script to wait while a process completes or before retrying a failed command.
HOW TO MAKE MAC SLEEP TIMER SERIES
> Check The Complete C++ Training Series Here. A typical sleep system call takes the time as the parameter that indicates how much time the program needs to sleep or remain inactive. When you're writing a shell script, you may find that you need it to wait a certain number of seconds before proceeding. To put a program (task, process or thread) to sleep we make use of a sleep system call.