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6.40. Bzip2-1.0.3
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Linux From Scratch - Version 6.1
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Chapter 6. 安装系统基础软件
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6.40. Bzip2-1.0.3
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<div class="package" lang="zh_cn" xml:lang="zh_cn">
<p>Bzip2 包含了对文件进行压缩和解压缩的工具，对于文本文件，<span><strong class="command">bzip2</strong></span> 比传统的 <span><strong class="command">gzip</strong></span> 拥有更高压缩比。
</p>
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<strong><span class="segtitle">预计编译时间：</span></strong> <span class="seg">0.1 SBU</span>
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<strong><span class="segtitle">所需磁盘空间：</span></strong> <span class="seg">3.9 MB</span>
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<strong><span class="segtitle">安装依赖于：</span></strong> <span class="seg">Bash, Binutils, Coreutils, Diffutils, GCC, Glibc, Make</span>
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<h2 class="sect2">
6.40.1. 安装 Bzip2
</h2>
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<p>Bzip2 软件包没有 <span><strong class="command">configure</strong></span> 脚本，用下面的命令直接编译：
</p>
<pre class="userinput"><kbd class="command">make -f Makefile-libbz2_so
make clean</kbd></pre>
<p><em class="parameter"><tt>-f</tt></em> 标志使 Bzip2 根据另一个 <tt class="filename">Makefile</tt> 来编译，这里就是 <tt class="filename">Makefile-libbz2_so</tt> 文件，它创建一个动态的 <tt class="filename">libbz2.so</tt> 库文件，然后把 Bzip2 工具连接到这个库上。</p>
<p>编译软件包：</p>
<pre class="userinput"><kbd class="command">make</kbd></pre>
<p>
要测试结果，请运行： <strong class="userinput"><tt>make test</tt></strong>
</p>
<p>
如果要重新安装 Bzip2，请务必先执行 <strong class="userinput"><tt>rm -f
/usr/bin/bz*</tt></strong> 命令，否则下面的
<span><strong class="command">make install</strong></span> 命令将会失败！</p>
<p>安装 Bzip2 ： </p>
<pre class="userinput"><kbd class="command">make install</kbd></pre>
<p>
把 <span><strong class="command">bzip2</strong></span> 二进制共享库拷贝到 <tt class="filename">/bin</tt> 目录，创建必要的符号链接，再做一些清理工作：</p>
<pre class="userinput"><kbd class="command">cp bzip2-shared /bin/bzip2
cp -a libbz2.so* /lib
ln -s ../../lib/libbz2.so.1.0 /usr/lib/libbz2.so
rm /usr/bin/{bunzip2,bzcat,bzip2}
ln -s bzip2 /bin/bunzip2
ln -s bzip2 /bin/bzcat</kbd></pre>
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<h2 class="sect2">
6.40.2. Bzip2 的内容 </h2>
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<strong><span class="segtitle">安装的程序：</span></strong> <span class="seg">bunzip2(链接到 bzip2), bzcat(链接到 bzip2), bzcmp, bzdiff, bzegrep, bzfgrep, bzgrep, bzip2, bzip2recover, bzless, bzmore</span>
</div>
<div class="seg">
<strong><span class="segtitle">安装的库：</span></strong> <span class="seg">libbz2.[a,so]</span>
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<h3>
<a id="id3329398" name="id3329398"></a>简要描述</h3>
<table border="0">
<col align="left" valign="top" />
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<td>
<a id="bunzip2" name="bunzip2"></a><span class="term"><span><strong class="command">bunzip2</strong></span></span>
</td>
<td>
<p>解压使用bzip2压缩的文件</p>
</td>
</tr>
<tr>
<td>
<a id="bzcat" name="bzcat"></a><span class="term"><span><strong class="command">bzcat</strong></span></span>
</td>
<td>
<p>解压缩指定的文件到标准输出</p>
</td>
</tr>
<tr>
<td>
<a id="bzcmp" name="bzcmp"></a><span class="term"><span><strong class="command">bzcmp</strong></span></span>
</td>
<td>
<p>
对bzip2压缩的文件运行 <span><strong class="command">cmp</strong></span> 命令。</p>
</td>
</tr>
<tr>
<td>
<a id="bzdiff" name="bzdiff"></a><span class="term"><span><strong class="command">bzdiff</strong></span></span>
</td>
<td>
<p>
对bzip2压缩的文件运行 <span><strong class="command">diff</strong></span>命令。</p>
</td>
</tr>
<tr>
<td>
<a id="bzgrep" name="bzgrep"></a><span class="term"><span><strong class="command">bzgrep</strong></span></span>
</td>
<td>
<p>
对bzip2压缩的文件运行 <span><strong class="command">grep</strong></span>命令。</p>
</td>
</tr>
<tr>
<td>
<a id="bzegrep" name="bzegrep"></a><span class="term"><span><strong class="command">bzegrep</strong></span></span>
</td>
<td>
<p>
对bzip2压缩的文件运行 <span><strong class="command">egrep</strong></span>命令。</p>
</td>
</tr>
<tr>
<td>
<a id="bzfgrep" name="bzfgrep"></a><span class="term"><span><strong class="command">bzfgrep</strong></span></span>
</td>
<td>
<p>
对bzip2压缩的文件运行 <span><strong class="command">fgrep</strong></span>命令。</p>
</td>
</tr>
<tr>
<td>
<a id="bzip2" name="bzip2"></a><span class="term"><span><strong class="command">bzip2</strong></span></span>
</td>
<td>
<p>
使用Burrows-Wheeler块排列文本压缩算法和霍夫曼编码来压缩文件。压缩比要大于 <strong class="command">gzip</strong> 工具使用的基于LZ77/LZ78的压缩算法(如gzip格式)，接近PPM统计压缩算法族的压缩比。</p>
</td>
</tr>
<tr>
<td>
<a id="bzip2recover" name="bzip2recover"></a><span class="term"><span><strong class="command">bzip2recover</strong></span></span>
</td>
<td>
<p>试图从被破坏的bzip2文件中恢复数据。</p>
</td>
</tr>
<tr>
<td>
<a id="bzless" name="bzless"></a><span class="term"><span><strong class="command">bzless</strong></span></span>
</td>
<td>
<p>
对bzip2压缩的文件运行 <span><strong class="command">less</strong></span>
命令。</p>
</td>
</tr>
<tr>
<td>
<a id="bzmore" name="bzmore"></a><span class="term"><span><strong class="command">bzmore</strong></span></span>
</td>
<td>
<p>
对bzip2压缩的文件运行 <span><strong class="command">more</strong></span>命令。</p>
</td>
</tr>
<tr>
<td>
<a id="libbz2" name="libbz2"></a><span class="term"><tt class="filename">libbz2*</tt></span>
</td>
<td>
<p>是利用Burrows-Wheeler算法，实现无损块顺序数据压缩的库文件。</p>
</td>
</tr>
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