[root@oldboy ~]# vim randc.sh 
#!/bin/bash
declare  -a  char=("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")
declare  -i num=10
function generator(){

        local n=10
        local string
        local ele
        for ((i=0;i<n;i++));do
                ele=${char[$[$RANDOM%26]]}
                string=$(echo "$ele$string")
        done
        echo $string
}
function main(){

        local n=10
        for((i=0;i<n;i++));do
                str=$(generator)
                if [ $? -eq 0 ];then
                        touch "${str}.html"
                fi
        done
}
main