Menu
Is it possible in Linux command line to have a command repeat every n seconds?
Say, I have an import running, and I am doing
ls -l to check if the file size is increasing. I would like to have a command to have this repeat automatically.
734
Run a Command Multiple Times in Linux using a while Loop Another important part of the while loop is i=$(($i+1)) or (($i++)) which increments the counter until the test condition becomes false.
There's a built-in Unix command repeat whose first argument is the number of times to repeat a command, where the command (with any arguments) is specified by the remaining arguments to repeat . For example, % repeat 100 echo "I will not automate this punishment." will echo the given string 100 times and then stop.
Watch every 5 seconds ...
watch -n 5 ls -l
If you wish to have visual confirmation of changes, append --differences prior to the ls command.
According to the OSX man page, there's also
The --cumulative option makes highlighting "sticky", presenting a running display of all positions that have ever changed. The -t or --no-title option turns off the header showing the interval, command, and current time at the top of the display, as well as the following blank line.
Linux/Unix man page can be found here
160
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
