newxml/chapter06/bzip2.xml

   1 <?xml version="1.0" encoding="ISO-8859-1"?>
   2 <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
   3   <!ENTITY % general-entities SYSTEM "../general.ent">
   4   %general-entities;
   5 ]>
   6 <sect1 id="ch-system-bzip2" xreflabel="Bzip2">
   7 <title>Bzip2-&bzip2-version;</title>
   8 <?dbhtml filename="bzip2.html"?>
   9
  10 <indexterm zone="ch-system-bzip2"><primary sortas="a-Bzip2">Bzip2</primary></indexterm>
  11
  12 <para>The Bzip2 package contains programs for compressing and decompressing
  13 files. On text files they achieve a much better compression than the
  14 traditional <command>gzip</command>.</para>
  15
  16 <screen>&buildtime; 0.1 SBU
  17 &diskspace; 3.0 MB</screen>
  18
  19 <para>Bzip2 installation depends on: Bash, Binutils, Coreutils, Diffutils,
  20 GCC, Glibc, Make.</para>
  21
  22
  23
  24 <sect2>
  25 <title>Installation of Bzip2</title>
  26
  27 <para>Prepare Bzip2 for compilation with:</para>
  28
  29 <screen><userinput>make -f Makefile-libbz2_so
  30 make clean</userinput></screen>
  31
  32 <para>The <emphasis>-f</emphasis> flag will cause Bzip2 to be built
  33 using a different <filename>Makefile</filename> file, in this case the
  34 <filename>Makefile-libbz2_so</filename> file, which creates a dynamic
  35 <filename>libbz2.so</filename> library and links the Bzip2 utilities
  36 against it.</para>
  37
  38 <para>Compile the package:</para>
  39
  40 <screen><userinput>make</userinput></screen>
  41
  42 <para>If you are reinstalling Bzip2, you need to do
  43 <userinput>rm -f /usr/bin/bz*</userinput> first, otherwise the following
  44 <command>make install</command> will fail.</para>
  45
  46 <para>Install the programs:</para>
  47
  48 <screen><userinput>make install</userinput></screen>
  49
  50 <para>Now install the shared <command>bzip2</command> binary into the
  51 <filename class="directory">/bin</filename> directory, then make some
  52 necessary symbolic links, and clean up:</para>
  53
  54 <screen><userinput>cp bzip2-shared /bin/bzip2
  55 cp -a libbz2.so* /lib
  56 ln -s ../../lib/libbz2.so.1.0 /usr/lib/libbz2.so
  57 rm /usr/bin/{bunzip2,bzcat,bzip2}
  58 mv /usr/bin/{bzip2recover,bzless,bzmore} /bin
  59 ln -s bzip2 /bin/bunzip2
  60 ln -s bzip2 /bin/bzcat</userinput></screen>
  61
  62 </sect2>
  63
  64
  65 <sect2 id="contents-bzip2"><title>Contents of Bzip2</title>
  66
  67 <para><emphasis>Installed programs</emphasis>: bunzip2 (link to bzip2), bzcat
  68 (link to bzip2), bzcmp, bzdiff, bzegrep, bzfgrep, bzgrep, bzip2, bzip2recover,
  69 bzless and bzmore</para>
  70
  71 <para><emphasis>Installed libraries</emphasis>: libbz2.a, libbz2.so (link to
  72 libbz2.so.1.0), libbz2.so.1.0 (link to libbz2.so.&bzip2-version;) and
  73 libbz2.so.&bzip2-version;</para>
  74
  75 </sect2>
  76
  77 <sect2><title>Short descriptions</title>
  78
  79 <indexterm zone="ch-system-bzip2 bunzip2"><primary sortas="b-bunzip2">bunzip2</primary></indexterm>
  80 <para id="bunzip2"><command>bunzip2</command> decompresses bzipped files.</para>
  81
  82 <indexterm zone="ch-system-bzip2 bzcat"><primary sortas="b-bzcat">bzcat</primary></indexterm>
  83 <para id="bzcat"><command>bzcat</command> decompresses to standard output.</para>
  84
  85 <indexterm zone="ch-system-bzip2 bzcmp"><primary sortas="b-bzcmp">bzcmp</primary></indexterm>
  86 <para id="bzcmp"><command>bzcmp</command> runs cmp on bzipped files.</para>
  87
  88 <indexterm zone="ch-system-bzip2 bzdiff"><primary sortas="b-bzdiff">bzdiff</primary></indexterm>
  89 <para id="bzdiff"><command>bzdiff</command> runs diff on bzipped files.</para>
  90
  91 <indexterm zone="ch-system-bzip2 bzgrep"><primary sortas="b-bzgrep">bzgrep</primary></indexterm>
  92 <para id="bzgrep"><command>bzgrep</command> and friends run grep on bzipped files.</para>
  93
  94 <indexterm zone="ch-system-bzip2 bzip2"><primary sortas="b-bzip2">bzip2</primary></indexterm>
  95 <para id="bzip2"><command>bzip2</command> compresses files using the Burrows-Wheeler
  96 block sorting text compression algorithm with Huffman coding. The compression
  97 rate is generally considerably better than that achieved by more conventional
  98 compressors using LZ77/LZ78, like <command>gzip</command>.</para>
  99
 100 <indexterm zone="ch-system-bzip2 bzip2recover"><primary sortas="b-bzip2recover">bzip2recover</primary></indexterm>
 101 <para id="bzip2recover"><command>bzip2recover</command> tries to recover data from damaged
 102 bzip2 files.</para>
 103
 104 <indexterm zone="ch-system-bzip2 bzless"><primary sortas="b-bzless">bzless</primary></indexterm>
 105 <para id="bzless"><command>bzless</command> runs less on bzipped files.</para>
 106
 107 <indexterm zone="ch-system-bzip2 bzmore"><primary sortas="b-bzmore">bzmore</primary></indexterm>
 108 <para id="bzmore"><command>bzmore</command> runs more on bzipped files.</para>
 109
 110 <indexterm zone="ch-system-bzip2 libbz2"><primary sortas="c-libbz2*">libbz2*</primary></indexterm>
 111 <para id="libbz2"><command>libbz2*</command> is the library implementing lossless,
 112 block-sorting data compression, using the Burrows-Wheeler algorithm.</para>
 113
 114 </sect2>
 115
 116
 117
 118 </sect1>