小写字母随机长度

    [root@LAMP-2~]# cat lower.sh 
    a=(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)
    for i in 12345678910
    do
    echo -n ${a[$RANDOM % ${#a[*]}]}
    done
    echo
    [root@LAMP-2~]# sh lower.sh 
    seyhouljnu
    [root@LAMP-2~]#