Repeat every n seconds forever

Repeat a command, on a loop, so you can monitor a process.

I wanted to repeat this every 5 seconds:

dir . *.* -recurse | measure | % Count

And used this command to achieve it:

cls; while ($true) { dir . *.* -recurse | measure | % Count; start-sleep -seconds 5; }

This example will show you the file size, every second (expressed in GB)

while($true) { dir *wellsrv* | % { $_.Length / 1gb; sleep 1} }

Here's one that shows the current time, the file name and size every 20 seconds

while($true) { dir outputlog.txt | % { "" + (get-date -f "yyyy-MM-dd HH:mm:ss") + ": " + ($.Name) + ", " + ($.Length / 1gb) + " GB"; sleep 30 } }

Here's one that shows how much space is left on the drive...

while (1) { 
    get-psdrive C | 
        % { 
            "" + "{0:0.00}" -f ($_.Used/1GB) + " used, " + 
            "{0:0.00}" -f ($_.Free/1GB)   + " free"
        }; 
        sleep 3;
}

See also

• example of using 'watch' in linux