Creating a child process for exucution (RHEL )

[Charles2321]

Complete beginner learing creating a script to but run and killed using the ps command 

this is the script my professer gave as an example

!#/bin/bash

while true : do

var=1

var [[ var -lt 50000]] : do

var=$((var+1))

done

sleep 1 

done

First of should you always type " while do "?

Also id like the understand why he used brackets instead of "()" 

Any help on creating my own process would be helpful as this is for a class 

[bbbk · Accepted solution]

https://stackoverflow.com/questions/2188199/how-to-use-double-or-single-brackets-parentheses-curly-b...

for simple process (script) you can just write sleep xxx inside script :-)

in example:

sleep.sh:

#!/bin/bash
sleep 100


run it with

./sleep.sh &

will start your script/process in background and return shell PID you can kill