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Killing Child Processes on Exit

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Trap expressions don’t have to be individual functions or programs, they can be more complex expressions as well.

By combining jobs -p and kill, we can kill all spawned child processes of the shell on exit: 

trap 'jobs -p | xargs kill' EXIT
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Using trap to react to signals and system events:
*Using trap to react to signals and system events
*Introduction clean up temporary files
*Catching SIGINT or Ctl C
*Accumulate a list of trap work to run at exit.
*Killing Child Processes on Exit
*react on change of terminals window size
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