How to create a bash variable like $RANDOM

Question

I\'m interest in some thing : every time I echo $RANDOM , the show value difference . I guess the RANDOM is special (When I read it , it may call a function , s

Answer 1

If you are BASH scripting there is a $RANDOM variable already internal to BASH. This post explains the random variable $RANDOM:

http://tldp.org/LDP/abs/html/randomvar.html

It generates a number from 0 - 32767.

If you want to do different things then something like this:

case $RANDOM in
[1-10000])
  Message="All is quiet."
  ;;
[10001-20000])
  Message="Start thinking about cleaning out some stuff.  There's a partition that is $space % full."
  ;;
[20001-32627])
  Message="Better hurry with that new disk...  One partition is $space % full."
  ;;
esac