Help with shell script for know when a file change it

Shell Programming and Scripting
1

Hi,

I�d like to know how to program a shell script for know when a file changes and based on that make another tasks all this in real time.. Thanks

2

Removed (didn't read properly)

3

What OS are you on? Linux has the inotifywait command. It waits (does nothing) and causes the script to sit there until a file changes:

while true
do
  inotifywait -e modify myfile
  echo 'file myfile changed' | mailx -s 'file change'  me@mycompany.com
  # put command here to run other programs
done