Bash: Return random number or string from array or range

random_strings_or_numbers.md

Return random string from array:

#!/usr/bin/env bash
subnets[0]="subnet1"
subnets[1]="subnet2"
subnets[2]="subnet3"

size=${#subnets[@]}
index=$(($RANDOM % $size))
echo ${subnets[$index]}

Return random rumber from range:

#!/usr/bin/env bash
echo $[ $RANDOM % 3 + 1 ]