To do that, you will need to use the sleep command to delay for a specified amount of time in seconds, minutes, hours or days.. To pause using the sleep command, pass the amount of time that has to paused as arguments to the command. ... , I am trying to understand what would happen if ther is a loop without any delay like sleep statement, I feel that would add a lot of load onto the CPU. This is failsafe while read loop for reading text files. Following is the syntax of bash sleep : SUFFIX is optional and can be : s – seconds m – minutes h – hours d – days When no SUFFIX is provided, by default, the NUMBER is considered to be seconds. Syntax while command do Statement(s) to be executed if command is true done Here the Shell command is evaluated. Thanks. Using Sleep to Pause Execution of a Script. Top Forums Shell Programming and Scripting while loop and delay # 1 06-22-2007 asadlone. It is usually used when you need to manipulate the value of a variable repeatedly. Bash Sleep Command Bash Sleep command is used to insert a delay or pause the execution for a specified period of time. Script Timer condition while loop in a shell. SECONDS Each time this parameter is referenced, the number of seconds since shell invocation is returned. There are three basic loop constructs in Bash scripting, for loop, while loop, and until loop. Thanks, Michael. The while loop enables you to execute a set of commands repeatedly until some condition occurs. Yes I have the problem with my simplified script (both samples) in the ISE/WMF 5.0 on Windows 10. Matt Bloomfield. It is the best tool to use when you need to execute a set of statements repeated based on a condition. Typically, you’d do this to allow some process sufficient time to complete before the script continues its processing. 44, 0. Sometimes you will need to pause execution for a specific period within a shell script. while loop a function and sleep to run for 15 minutes. You can use the sleep command in shell scripts to pause execution of the script for a precise amount of time. This is for checking whether my internet connection has “recovered” after suspend/hibernate. I don’t understand what makes the infinate while loop get terminated in the yes_or_no() function. The -r option to read command disables backslash escaping (e.g., \n, \t). Join Date: Jun 2007. while loop Example. IFS is used to set field separator (default is while space). This argument is a number indicating the number of seconds to sleep. April 17, 2016 at 3:15 am #37897. This tutorial covers the basics of while loops run bash script timer. shell for loop. Because SECONDS is an internal variable in bash. ... sleep 15; done. Participant. Last Activity: 3 June 2010, 7:13 AM EDT. Loops are handy when you want to run a series of commands a number of times until a particular condition is met. It stores the amount of time that the shell has been running. 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