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add cmd tips

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4
CONTRIBUTION.md
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@ -18,7 +18,7 @@
├── pic
│   ├── 1.3_byte_order.png
├── README.md
└── source
└── src
├── Crypto
├── Misc
├── Pwn
@ -32,7 +32,7 @@
- `CONTRIBUTION.md`：合作与贡献的相关内容。
- `doc`：该文件夹包含书全部内容的 Markdown 文件。（文字）
- `pic`：该文件夹包含所有 Markdown 中引用的所有图片文件。（图片）
- `source`：该文件夹包含书中示例和练习的二进制文件或源代码，分专题保存。（代码）
- `src`：该文件夹包含书中示例和练习的二进制文件或源代码，分专题保存。（代码）
##### 注意事项
- 在开始编写某一个内容之前，请先在下面的表格里注明，以避免重复和冲突。如果是已经完成的章节，则可以直接进行修改。

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LICENSE.md
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@ -1,427 +0,0 @@
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README.md
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@ -38,6 +38,7 @@
- [四、技巧篇](doc/4_tips.md)
- [4.1 AWD模式](doc/4.1_AWD.md)
- [4.2 Linux 命令行技巧](doc/4.2_Linux_terminal_tips.md)
- [五、高级篇](doc/5_advanced.md)
- [5.1 Fuzz 测试](doc/5.1_fuzz.md)

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doc/1.3_linux_basic.md
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@ -1,9 +1,11 @@
# Linux 基础
- [常用基础命令](#command)
- [字节序](#order)
- [常用基础命令](#常用基础命令)
- [字节序](#字节序)
- [输入输出](#输入输出)
## <span id="command">常用基础命令</span>
## 常用基础命令
```text
ls 用来显示目标列表
@ -32,7 +34,7 @@ nano / vim / emacs 字符终端的文本编辑器
```
## <span id="order">字节序</span>
## 字节序
目前计算机中采用两种字节存储机制：大端（Big-endian）和小端（Little-endian）。
>MSB (Most Significan Bit/Byte)：最重要的位或最重要的字节。
@ -44,3 +46,15 @@ Big-endian 规定 MSB 在存储时放在低地址，在传输时放在流的开
例如十六进制整数 0x12345678 存入以 1000H 开始的内存中：
![](../pic/1.3_byte_order.png)
## 输入输出
- 使用命令的输出作为可执行文件的输入参数
- ```$ ./vulnerable 'your_command_here'```
- ```$ ./vulnerable $(your_command_here)```
- 使用命令作为输入
- ```$ your_command_here | ./vulnerable```
- 将命令行输出写入文件
- ```$ your_command_here > filename```
- 使用文件作为输入
- ```$ ./vulnerable < filename```

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doc/1.5.1_c_basic.md
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# C 语言基础
- [从源代码到可执行文件](#compile)
- [从源代码到可执行文件](#从源代码到可执行文件)
## <span id="compile">从源代码到可执行文件</span>
## 从源代码到可执行文件
我们以经典著作《The C Programming Language》中的第一个程序 “Hello World” 为例，讲解 Linux 下 GCC 的编译过程。
```c

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doc/4.2_Linux_terminal_tips.md Normal file
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# Linux 命令行技巧
- [重定向输入字符](#重定向输入字符)
## 重定向输入字符
有时候我们需要在 shell 里输入键盘上没有对应的字符，如 `0x1F`，就需要使用重定向输入。下面是一个例子：[源码](../src/Others/4.2_0x1f.c)
![](../pic/4.2_0x1f.png)

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doc/6.1_Linuxtools.md
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@ -171,9 +171,9 @@ strings [executable] | grep -i upx
```
#### 练习
[strings_crackme](../source/Reverse/strings_crackme)
[strings_crackme](../src/Reverse/strings_crackme)
[flag_pwnablekr](../source/Reverse/flag_pwnablekr)
[flag_pwnablekr](../src/Reverse/flag_pwnablekr)
## xxd
@ -193,4 +193,4 @@ xxd -g1
```
#### 练习
[xxd_crackme](../source/Reverse/xxd_crackme) (使用 *strings* 再做一次)
[xxd_crackme](../src/Reverse/xxd_crackme) (使用 *strings* 再做一次)

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src/Others/4.2_0x1f.c Normal file
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#include<stdio.h>
#include<string.h>
void main() {
char data[8];
char str[8];
printf("请输入十六进制为 0x1f 的字符: ");
sprintf(str, "%c", 31);
scanf("%s", data);
if (!strcmp((const char *)data, (const char *)str)) {
printf("correct\n");
} else {
printf("wrong\n");
}
}

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