小编Beg*_*ers的帖子

#!/bin/bash

#

#

#

#

echo -e "please insert user name :"

read un

echo "$un"

len=${#un}

echo "$len"

ze=0

te=10

if [ "$len" -eq "$ze" ]

than

echo "no argument"

exit

fi

if [ "$len" -ge "$te" ]

than

echo "the Argument maximum 10 alphanumeric"

exit

fi