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vi /home/shell/passwd.sh

#!/bin/bash
a=(a b c d e A B C D E F @ $ % ^ 0 1 2 3 4 5 6 7 8 9)

for ((i=0;i<10;i++));do

echo -n ${a[$RANDOM % ${#a[@]}]}

done

echo

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[root@2 shell]# sh passwd.sh
BF8366c@13