Bash $RANDOM

Written by Benjamin Cane on 2011-07-01 23:11:38

Found this cool little thing today when I was looking for a way to create a random number in BASH. It seems that BASH does the hard work for you and creates a variable called $RANDOM

# echo $RANDOM  
26031  
# echo $RANDOM  
20163  
# echo $RANDOM  
30045

And if you want to print off a certain range such as 0 - 100 you can do it like so.

# echo $((RANDOM%100))  
81

Figured I would share this as it is a cool little trick.


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Benjamin is a Systems Architect working in the financial services industry focused on platforms that require Continuous Availability. He has been working with Linux and Unix for over 10 years now and has recently published his first book; Red Hat Enterprise Linux Troubleshooting Guide.

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