关于shell变量的第二个shell脚本

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1.文件名为test.sh

#！/bin/bash
#define path variables
#by authors lkp 2015-08-22

name=hanyanwei

echo "My name is $name"
echo $UID
echo $PWD
echo "#####################"
echo $0
echo $1

执行
sh test.sh

执行结果：
My name is hanyanwei
0
/root
#####################
test.sh

2.文件名为var.sh

#！/bin/bash
#define path variables
#by authors lkp 2015-08-22

name=hanyanwei

echo "My name is $name"
echo $UID
echo $PWD
echo "#####################"
echo $0
echo $1

执行
sh var.sh lkp

执行结果：
My name is hanyanwei
0
/root
#####################
var.sh
lkp

3.文件名为var.sh

#！/bin/bash
#define path variables
#by authors lkp 2015-08-22

name=hanyanwei

echo "My name is $name"
echo $UID
echo $PWD
echo "#####################"
echo $0
echo $1 $2

执行
sh var.sh parameter1 parameter2

执行结果：
My name is hanyanwei
0
/root
#####################
var.sh
parameter1 parameter2

4.文件名为var.sh

#！/bin/bash
#define path variables
#by authors lkp 2015-08-22

name=hanyanwei

echo "My name is $name"
echo $UID
echo $PWD
echo "#####################"
echo $0
echo $1 $2

执行
sh var.sh 123 abc

执行结果：
My name is hanyanwei
0
/root
#####################
var.sh
123 abc

5.文件名为var.sh

#！/bin/bash
#define path variables
#by authors lkp 2015-08-22

echo "#####################"
echo "The \$1 is $1"
echo "The \$2 is $2"
echo "The \$? is $?"
echo "The \$* is $*"
echo "The \$# is $#"

执行
sh var.sh

执行结果：
#####################
The $1 is
The $1 is
The $1 is 0
The $1 is
The $1 is 0

6.文件名为var.sh

#！/bin/bash
#define path variables
#by authors lkp 2015-08-22

echo "#####################"
echo "The \$1 is $1"
echo "The \$2 is $2"
echo "The \$? is $?"
echo "The \$* is $*"
echo "The \$# is $#"

执行
sh var.sh abc edf

执行结果：
#####################
The $1 is abc
The $1 is edf
The $1 is 0
The $1 is abc edf

The $1 is 2

$?的讲解

如上图：

我第一次输入执行： kdfjsdklfsd

会提 command not found

然后我再执行echo $?

结果是127

注解：127是错误码

127是命令没找到，command not found

然后我在执行： df -f

然后我再执行：echo $?

结果是0

注解：0表示程序执行成功了

只要返回值是 0，就代表程序执行成功了～

7.文件名为var1.sh

#！/bin/bash
#define path variables
#by authors lkp 2015-08-22

echo -e "\033[32m---------------------------\033[0m"
echo "This is $0 param !"
echo "This \$1 is $1 param !"
echo "This \$2 is $2 param !"
echo -e "\033[32m---------------------------\033[0m"
echo "This \$* is $* param !"
echo "This \$# is $# param !"
echo "This \$? is $? param !"

执行
sh var1.sh abc edf

执行结果：

8.文件名为var2.sh

#！/bin/bash
#define path variables
#by authors lkp 2015-08-22

echo -e "\033[32mPlease select Menu follow:\033[1m"
echo "1)安装apache服务器."
echo "2)安装Mysql服务器."
echo "1)安装php服务器."
echo "1)安装LAMP WEB架构."

echo "-----------------------------------------"

执行
sh var2.sh

执行结果：

0 0