例1.任意输入二个数然后做判断

vi number.sh

#!/bin/bash

#written by lizheng

echo "please enter two number"

read a

read b

if test $a -eq $b        

      then echo "NO.1 = NO.2"

elif test $a -gt $b

      then echo "NO.1 > NO.2"

else echo "NO.1 < NO.2"

fi