linux取随机数shell版本

1 #!/bin/bash
  2 aa=$(date +%N|md5sum|cut -c 3-10)
  3 
  4 for i in stuu{1..3}
  5 do
  6         useradd $i
  7         echo $aa|passwd --stdin $i
  8         echo "${i} ${aa}" >>$(date +%F%M%S).log
  9 done