If the user pressesĬTRL+BREAK or CTRL+C, the tool returns an ERRORLEVEL value If the user presses a key that is not a valid choice, the tool Listed returns a value of 1, the second a value of 2, and so on. Key that was selected from the set of choices. The ERRORLEVEL environment variable is set to the index of the M text Specifies the message to be displayed before D choice Specifies the default choice after nnnn seconds.Ĭharacter must be in the set of choices specifiedīy /C option and must also specify nnnn with /T. If 0 is specified, there will be no pause T timeout The number of seconds to pause before a defaultĬhoice is made. CS Enables case-sensitive choices to be selected.īy default, the utility is case-insensitive. The message before the prompt is displayed N Hides the list of choices in the prompt.
C choices Specifies the list of choices to be created. Of choices and returns the index of the selected choice. This tool allows users to select one item from a list I think it is the same on XP, but look at the help text on an XP computer to verify.
#Mac sleep command line windows#
A partial work-around is to obfuscate the situation - use the /N argument to hide the list of valid choices and only have 1 character in the set of choices so it will be less likely that the user will type a valid choice before the timeout expires.īelow is the help text on Windows Vista. The one thing that might be an issue is if the user types one of the choice characters before the timeout period elapses. Use the /T parameter to specify the timeout in seconds and the /D parameter to specify the default selection and ignore then selected choice. It's been around since MSDOS 6.0, and should do the trick.
#Mac sleep command line free#
If you have questions or suggestions, please feel free to ask.Try the Choice command.
If you are interested in shell scripting, perhaps you would like reading about string comparison in bash as well. I hope you didn’t sleep while reading these examples of sleep command ? It will introduce a delay of 1 hour, 37 minutes and 30 seconds. You can also use decimal points with other suffixes. So if you want to introduce a 5 milliseconds pause, use it like this: sleep 0.005 The good thing is that you can use floating point (decimal points) with sleep command. But what if your bash script to sleep for milliseconds? You might have noticed that the smallest unit of time in the sleep command is second. Note that the s suffix is still optional here. This will keep the script waiting for 1 hour, 10 minutes and 5 seconds. You can use more than one suffix and the duration of the sleep is the sum of all the suffix.įor example, if you use the follow command: sleep 1h 10m 5s You are not obliged to use only one suffix at a time. Sleep command with a combination of second, minute, hour and day This could help if you want to run on alternate days or week days. If you want to delay the script in hours, you can do that with the h option: sleep 2hĮven if you want to pause the bash script for days, you can do that with the d suffix: sleep 5d This will pause the script/shell for one minute. You can specify the sleep time in minutes in the following way: sleep 1m Sys 0m0.007s Sleep command with minute or hour or day suffix If you run it with the time command, you’ll see that the bash script actually ran for (a slightly) more than 5 seconds. In a sample bash script, it could look like this: !/bin/bash Suppose you want pause your bash script for 5 seconds, you can use sleep like this: sleep 5 Sleep command without suffix counts in seconds I am going to show the usage of sleep command through sample bash scripts. Though you can use it in a shell directly, the sleep command is commonly used to introduce a delay in the execution of a bash script. Let’s see some examples of the sleep command. Sleep command has a simple syntax: sleep Number So, if you use the sleep command with x and the next command can only be run after x seconds. In other words, it introduces a delay for a specified time. As you can guess from the name, its only function is to sleep. Linux sleep command is one of the simplest commands out there.