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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>4.12. 进制转换 - 16进制 - 8进制 - 二进制</title><link rel="stylesheet" type="text/css" href="../docbook.css" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><meta name="keywords" content="shell,bash,zsh, awk,sed,curl,expect, grep,sort" /><link rel="home" href="../index.html" title="Netkiller Shell 手札" /><link rel="up" href="index.html" title="第 4 章 Shell 命令" /><link rel="prev" href="flock.html" title="4.11. flock - manage locks from shell scripts" /><link rel="next" href="diff.html" title="4.13. 文件比较" /></head><body><a xmlns="" href="//www.netkiller.cn/">Home</a> | <a xmlns="" href="//netkiller.github.io/">简体中文</a> | <a xmlns="" href="http://netkiller.sourceforge.net/">繁体中文</a> | <a xmlns="" href="/journal/index.html">杂文</a>
| <a xmlns="" href="https://github.com/netkiller">Github</a> | <a xmlns="" href="https://zhuanlan.zhihu.com/netkiller">知乎专栏</a> | <a xmlns="" href="https://www.facebook.com/bg7nyt">Facebook</a> | <a xmlns="" href="http://cn.linkedin.com/in/netkiller/">Linkedin</a> | <a xmlns="" href="https://www.youtube.com/user/bg7nyt/videos">Youtube</a> | <a xmlns="" href="//www.netkiller.cn/home/donations.html">打赏(Donations)</a> | <a xmlns="" href="//www.netkiller.cn/home/about.html">About</a><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">4.12. 进制转换 - 16进制 - 8进制 - 二进制</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="flock.html">上一页</a> </td><th width="60%" align="center">第 4 章 Shell 命令</th><td width="20%" align="right"> <a accesskey="n" href="diff.html">下一页</a></td></tr></table><hr /></div><table xmlns=""><tr><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&repo=netkiller.github.io&type=watch&count=true&size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&repo=netkiller.github.io&type=fork&count=true&size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&type=follow&count=true&size=large" height="30" width="240" frameborder="0" scrolling="0" style="width:240px; height: 30px;" allowTransparency="true"></iframe></td><td></td><td><a href="https://zhuanlan.zhihu.com/netkiller"><img src="/images/logo/zhihu-card-default.svg" height="25" /></a></td><td valign="middle"><a href="https://zhuanlan.zhihu.com/netkiller">知乎专栏</a></td><td></td><td></td><td></td><td></td></tr></table><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="binary"></a>4.12. 进制转换 - 16进制 - 8进制 - 二进制</h2></div></div></div>
<div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="od"></a>4.12.1. od - dump files in octal and other formats</h3></div></div></div>
<div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="id897"></a>4.12.1.1. 16进制</h4></div></div></div>
<pre class="screen">
neo@netkiller ~ % echo "helloworld" | od -x
0000000 6568 6c6c 776f 726f 646c 000a
0000013
neo@netkiller ~ % echo "helloworld" | od -x -An
6568 6c6c 776f 726f 646c 000a
</pre>
</div>
<div class="section"><div class="titlepage"><div><div><h4 class="title"><a id=""></a>4.12.1.2. 使用 od 随机生成密码</h4></div></div></div>
<pre class="screen">
neo@netkiller ~ % od -vN 32 -An -tx1 /dev/urandom | tr -d ' \n'
a6bf6dad8ed860a234046b66d550008f61c36e9cb2630c22d935dac5e20d7920
</pre>
</div>
</div>
<div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="hexdump"></a>4.12.2. hexdump, hd -- ASCII, decimal, hexadecimal, octal dump</h3></div><div><h4 class="subtitle">以十六进制方式显示二进制文件</h4></div></div></div>
<pre class="screen">
neo@netkiller ~ % hexdump -n 256 -C ./coutput/HelloWorld.bin
00000000 36 30 36 30 36 30 34 30 35 32 33 34 31 35 36 31 |6060604052341561|
00000010 30 30 30 66 35 37 36 30 30 30 38 30 66 64 35 62 |000f57600080fd5b|
00000020 36 31 30 32 65 33 38 30 36 31 30 30 31 65 36 30 |6102e38061001e60|
00000030 30 30 33 39 36 30 30 30 66 33 30 30 36 30 36 30 |00396000f3006060|
00000040 36 30 34 30 35 32 36 30 30 34 33 36 31 30 36 31 |6040526004361061|
00000050 30 30 34 63 35 37 36 30 30 30 33 35 37 63 30 31 |004c576000357c01|
00000060 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 |0000000000000000|
*
00000090 30 30 30 30 30 30 30 30 39 30 30 34 36 33 66 66 |00000000900463ff|
000000a0 66 66 66 66 66 66 31 36 38 30 36 33 34 65 64 33 |ffffff1680634ed3|
000000b0 38 38 35 65 31 34 36 31 30 30 35 31 35 37 38 30 |885e146100515780|
000000c0 36 33 36 64 34 63 65 36 33 63 31 34 36 31 30 30 |636d4ce63c146100|
000000d0 61 65 35 37 35 62 36 30 30 30 38 30 66 64 35 62 |ae575b600080fd5b|
000000e0 33 34 31 35 36 31 30 30 35 63 35 37 36 30 30 30 |341561005c576000|
000000f0 38 30 66 64 35 62 36 31 30 30 61 63 36 30 30 34 |80fd5b6100ac6004|
00000100
</pre>
</div>
<div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="xxd"></a>4.12.3. xxd - make a hexdump or do the reverse.</h3></div></div></div>
<pre class="screen">
neo@MacBook-Pro ~/workspace % xxd -b netkiller.dat
00000000: 00000000 00000000 00000000 11111111 00000000 00000000 ......
00000006: 00000000 00000000 11111111 11111111 11111111 11111111 ......
</pre>
<div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="xxd.col"></a>4.12.3.1. 指定每行的列数</h4></div></div></div>
<pre class="screen">
neo@MacBook-Pro ~ % xxd -c 2 -b netkiller.bin
00000000: 10010110 01001000 .H
</pre>
</div>
<div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="xxd.skip"></a>4.12.3.2. 跳过字节</h4></div></div></div>
<p>跳过两个字节，三列显示</p>
<pre class="screen">
neo@MacBook-Pro ~ % xxd -s 2 -c 3 -b netkiller.txt
00000002: 11101001 10011001 10001000 ...
00000005: 11100110 10011001 10101111 ...
00000008: 11100101 10110011 10110000 ...
</pre>
</div>
</div>
<div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="binutils"></a>4.12.4. binutils</h3></div></div></div>
<pre class="screen">
$ sudo apt-get install binutils
</pre>
<div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="strings"></a>4.12.4.1. strings - print the strings of printable characters in files.</h4></div></div></div>
<pre class="screen">
tcpdump -i eth0 -s 0 -l -w - dst port 80 | strings
</pre>
</div>
</div>
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