一、撰写一个script,让使用者输入：1.first name 2.last name，最后在屏幕上显示：Your full name is:的内容
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#!/bin/bash
read -p
"Please input your firstname:"
firstname
read -p
"Please input your lastname:"
lastname
echo -e
"Your full name is:$firstname $lastname"
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二、用户输入2个变量，然后将2个变量相乘，最后输出相乘结果
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#!/bin/bash
read
-p
"input first number:"
firstnu
read
-p
"input second number:"
secnu
total=$(($firstnu*$secnu))
echo
-e
"the result of $firstnu x $secnu is $total"
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三、使用source执行script，可将变量置于父进程（环境）中
四、用户输入一个filename，并做如下判断：
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filename的档案是否存在，不存在就终止程序
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若存在，则判断是文件还是目录，并输入结果
-
判断当前身份用户对该档案/目录所具有的权限，并输出结果
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#!/bin/bash
echo
-e
"Please input a filename,this program will check the file's type and permission"
read
-p
"Input a filename:"
filename
#1.判断使用者是否真有输入字符串
test
-z $filename&&
echo
"You must input a filename"
&&
exit
0
#2.判断档案是否存在，不存在则终止程序
test
! -e $filename&&
echo
"the filename $filename no exist"
&&
exit
0
#3.判断文件类型及属性
test
-f $filename&&filetype=
"regular file"
test
-d $filename&&filetype=
"directory"
test
-r $filename&&perm=
"readable"
test
-w $filename&&perm=
"$perm writable"
test
-x $filename&&perm=
"$perm executable"
#4.开始输出信息
echo
"The filename: $filename is a $filetype"
echo
"The permisson are: $perm"
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五、使用中括号代替test进行判断
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#!/bin/bash
read
-p
"Please choose Y/N:"
yn
[
"$yn"
==
"y"
-o
"$yn"
==
"Y"
]&&
echo
-e
"OK,continue"
&&
exit
0
[
"$yn"
==
"n"
-o
"$yn"
==
"N"
]&&
echo
-e
"Oh,interrupt"
&&
exit
0
echo
-e
"I don't know what you mean"
&&
exit
0
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六、使用if..elif..then..fi判断式
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#!/bin/bash
read
-p
"Please choose Y/N:"
yn
if
[
"$yn"
==
"Y"
]||[
"$yn"
==
"y"
];
then
echo
-e
"OK,continue"
elif
[
"$yn"
==
"N"
]||[
"$yn"
==
"n"
];
then
echo
-e
"Oh,interrupt"
else
echo
-e
"I don't know what you mean"
fi
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