Programming Tips - How can I have a random delay in a bash script?

Date: 2016jun15 Language: bash Q. How can I have a random delay in a bash script? A. Use $RANDOM and sleep like this:
#!/bin/sh # Make a random number less than 10 delay=$((RANDOM % 10)) # Display it echo "delay=$delay" # Sleep for it sleep $delay
Or simply:
sleep $((RANDOM % 10))
Note that case matters, $random doesn't work.