Bash select random string from list [duplicate]

Answer 1

Store in array, count and random select:

#!/bin/bash
array[0]="file1.sdf"
array[1]="file2.sdf"
array[2]="file3.sdf"
array[3]="file4.sdf"

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