Linux下生產隨機字符

Linux下生產隨機字符   #!/bin/sh   www.2cto.com     alphabeta="a b c d e f g h i j k l m n o p q r s t u v w x y z"  number="0 1 2 3 4 5 6 7 8 9"    A=($alphabeta) # save as array  N=($number)  num_a=${#A } num_n=${#N }   echo ${A[$((RANDOM%num_a))]}${N[$((RANDOM%num_n))]}