135 lines
7.5 KiB
HTML
135 lines
7.5 KiB
HTML
<head>
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<title>gzip(1) - Plan 9 from User Space</title>
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<meta content="text/html; charset=utf-8" http-equiv=Content-Type>
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</head>
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<body bgcolor=#ffffff>
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<table border=0 cellpadding=0 cellspacing=0 width=100%>
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<tr height=10><td>
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<tr><td width=20><td>
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<tr><td width=20><td><b>GZIP(1)</b><td align=right><b>GZIP(1)</b>
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<tr><td width=20><td colspan=2>
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<br>
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<p><font size=+1><b>NAME </b></font><br>
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<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
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gzip, gunzip, bzip2, bunzip2, zip, unzip, – compress and expand
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data<br>
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</table>
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<p><font size=+1><b>SYNOPSIS </b></font><br>
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<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
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<tt><font size=+1>gzip</font></tt> [<tt><font size=+1>−cvD</font></tt>[<tt><font size=+1>1−9</font></tt>]] [<i>file</i> <tt><font size=+1>...</font></tt>]
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<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
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<tt><font size=+1>gunzip</font></tt> [<tt><font size=+1>−ctTvD</font></tt>] [<i>file</i> <tt><font size=+1>...</font></tt>]
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<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
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<tt><font size=+1>bzip2</font></tt> [<tt><font size=+1>−cvD</font></tt>[<tt><font size=+1>1−9</font></tt>]] [<i>file</i> <tt><font size=+1>...</font></tt>]
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<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
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<tt><font size=+1>bunzip2</font></tt> [<tt><font size=+1>−cvD</font></tt>] [<i>file</i> <tt><font size=+1>...</font></tt>]
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<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
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<tt><font size=+1>zip</font></tt> [<tt><font size=+1>−vD</font></tt>[<tt><font size=+1>1−9</font></tt>]] [<tt><font size=+1>−f</font></tt> <i>zipfile</i>] <i>file</i> [<tt><font size=+1>...</font></tt>]
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<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
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<tt><font size=+1>unzip</font></tt> [<tt><font size=+1>−cistTvD</font></tt>] [<tt><font size=+1>−f</font></tt> <i>zipfile</i>] <i>[</i>file <tt><font size=+1>...</font></tt>]<br>
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</table>
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<p><font size=+1><b>DESCRIPTION </b></font><br>
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<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
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<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
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<i>Gzip</i> encodes files with a hybrid Lempel-Ziv 1977 and Huffman compression
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algorithm known as <tt><font size=+1>deflate</font></tt>. Most of the time, the resulting file
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is smaller, and will never be much bigger. Output files are named
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by taking the last path element of each file argument and appending
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<tt><font size=+1>.gz</font></tt>; if the resulting name ends with
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<tt><font size=+1>.tar.gz</font></tt>, it is converted to <tt><font size=+1>.tgz</font></tt> instead. <i>Gunzip</i> reverses the
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process. Its output files are named by taking the last path element
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of each file argument, converting <tt><font size=+1>.tgz</font></tt> to <tt><font size=+1>.tar.gz</font></tt>, and stripping
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any <tt><font size=+1>.gz</font></tt>; the resulting name must be different from the original
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name.
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<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
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<i>Bzip2</i> and <i>bunzip2</i> are similar in interface to <i>gzip</i> and <i>gunzip</i>,
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but use a modified Burrows-Wheeler block sorting compression algorithm.
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The default suffix for output files is <tt><font size=+1>.bz2</font></tt>, with <tt><font size=+1>.tar.bz2</font></tt> becoming
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<tt><font size=+1>.tbz</font></tt>. <i>Bunzip2</i> recognizes the extension <tt><font size=+1>.tbz2</font></tt> as a synonym for
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<tt><font size=+1>.tbz</font></tt>.
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<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
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<i>Zip</i> encodes the named files and places the results into the archive
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<i>zipfile</i>, or the standard output if no file is given. <i>Unzip</i> extracts
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files from an archive created by <i>zip</i>. If no files are named as
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arguments, all of files in the archive are extracted. A directory’s
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name implies all recursively contained files and subdirectories.
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<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
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None of these programs removes the original files. If the process
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fails, the faulty output files are removed.
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<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
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The options are:<br>
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<tt><font size=+1>−c</font></tt> Write to standard output rather than creating an output file.<br>
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<tt><font size=+1>−i</font></tt> Convert all archive file names to lower case.<br>
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<tt><font size=+1>−s</font></tt> Streaming mode. Looks at the file data adjacent to each compressed
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file rather than seeking in the central file directory. This is
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the mode used by <i>unzip</i> if no <i>zipfile</i> is specified. If <tt><font size=+1>−s</font></tt> is given,
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<tt><font size=+1>−T</font></tt> is ignored.<br>
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<tt><font size=+1>−t</font></tt> List matching files in the archive rather than extracting them.<br>
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<tt><font size=+1>−T</font></tt> Set the output time to that specified in the archive.<br>
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<tt><font size=+1>−1</font></tt> .. <tt><font size=+1>−9</font></tt> Sets the compression level. <tt><font size=+1>−1</font></tt> is tuned for speed, <tt><font size=+1>−9</font></tt>
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for minimal output size. The best compromise is <tt><font size=+1>−6</font></tt>, the default.<br>
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<tt><font size=+1>−v</font></tt> Produce more descriptive output. With <tt><font size=+1>−t</font></tt>, adds the uncompressed
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size in bytes and the modification time to the output. Without
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<tt><font size=+1>−t</font></tt>, prints the names of files on standard error as they are compressed
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or decompressed.<br>
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<tt><font size=+1>−D</font></tt> Produce debugging output.<br>
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</table>
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<p><font size=+1><b>SOURCE </b></font><br>
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<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
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<tt><font size=+1>/usr/local/plan9/src/cmd/gzip<br>
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/usr/local/plan9/src/cmd/bzip2<br>
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</font></tt>
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</table>
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<p><font size=+1><b>SEE ALSO </b></font><br>
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<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
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<a href="../man1/tar.html"><i>tar</i>(1)</a>, <a href="../man1/compress.html"><i>compress</i>(1)</a><br>
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</table>
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<p><font size=+1><b>BUGS </b></font><br>
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<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
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<i>Unzip</i> can only extract files which are uncompressed or compressed
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with the <tt><font size=+1>deflate</font></tt> compression scheme. Recent zip files fall into
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this category.<br>
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</table>
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<td width=20>
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<tr height=20><td>
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</table>
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<!-- TRAILER -->
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<table border=0 cellpadding=0 cellspacing=0 width=100%>
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<tr height=15><td width=10><td><td width=10>
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<tr><td><td>
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<center>
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<a href="../../"><img src="../../dist/spaceglenda100.png" alt="Space Glenda" border=1></a>
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</center>
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</table>
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<!-- TRAILER -->
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</body></html>
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