自己写了一下小的shell实例，虽然很小，但所有的大的程序都是由小的模块堆积起来的，程序员一定要懂得一种脚本的书写，而我，只会在linux下工作，所以就只能写linux的shell脚本了，呵呵，本文会陆续更新，给自己加油！
1.模拟linnux登录shell
#/bin/bash
echo -n "login:"
read name
echo -n "password:"
read passwd
if [ $name = "cht" -a $passwd = "abc" ];then
echo "the host and password is right!"
else echo "input is error!"
fi
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2.比较两个数大小
#/bin/bash
echo "please enter two number"
read a
read b
if test $a -eq $b
then echo "NO.1 = NO.2"
elif test $a -gt $b
then echo "NO.1 > NO.2"
else echo "NO.1 < NO.2"
fi
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3.查找/root/目录下是否存在该文件
#/bin/bash
echo "enter a file name:"
read a
if test -e /root/$a
then echo "the file is exist!"
else echo "the file is not exist!"
fi
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4.for循环的使用
#/bin/bash
clear
for num in 1 2 3 4 5 6 7 8 9 10
do
echo "$num"
done
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5.
#/bin/bash
echo "Please enter a user:"
read a
b=$(whoami)
if test $a = $b
then echo "the user is running."
else echo "the user is not running."
fi
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6.删除当前目录下大小为0的文件
#/bin/bash
for filename in `ls`
do
if test -d $filename
then b=0
else
a=$(ls -l $filename | awk '{ print $5 }')
if test $a -eq 0
then rm $filename
fi
fi
done
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7.如果/export/um_lpp_source下有文件，那么将其文件系统大小改为3G
#/bin/bash
while line=`ls /export/um_lpp_source`
do
if test $line=""
then echo "NULL"
sleep 1
else echo $line
chfs -a size=3G /export/um_lpp_source
exit 0
fi
done
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8.测试IP地址
#/bin/bash
for i in 1 2 3 4 5 6 7 8 9
do
echo "the number of $i computer is "
ping -c 1 192.168.0.$i
done
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9.如果test.log的大小大于0，那么将/opt目录下的*.tar.gz文件
#/bin/sh
a=2
while name="test.log"
do
sleep 1
b=$(ls -l $name | awk '{print $5}')
if test $b -ge $a
#then echo "OK"
then `cp /opt/*.tar.gz .`
exit 0
fi
done
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10.打印读取的内容，为下面的例子做准备
#/bin/bash
while read name
do
echo $name
done
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11.从0.sh中读取内容并打印
#/bin/bash
while read line
do
echo $line
done < 0.sh
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12.读取a.c中的内容并做加1运算
#/bin/bash
test -e a.c
while read line
do
a=$(($line+1))
done < a.c
echo $a
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13.普通无参数函数
#/bin/bash
p ()
{
echo "hello"
}
p
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14.给函数传递参数
#/bin/bash
p_num ()
{
num=$1
echo $num
}
for n in $@
do
p_num $n
don