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git-svn-id: svn+ssh://atelier.inf.usi.ch/home/bevilj/group-1@213 a672b425-5310-4d7a-af5c-997e18724b81
140 lines
2.9 KiB
HTML
140 lines
2.9 KiB
HTML
---
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layout: page
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category-title: Intermediate commands
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category-page: intermediate
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tags:
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author: Andrea Brites Marto
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title: 7z
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---
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<p>
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A .7z. file is an archive format that stands for 7-zip. By default, Mac OS X does not know how to handle these files, but that is not a big deal because you can download for free in App Store. The program supports 7z, ZIP, CAB, ARJ, BZIP2, TAR, CPIO, RPM and DEB.<br>
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So, first of all, you need to download Unarchiver in order to use this command.<br>
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The basic syntax is:
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</p>
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<pre>
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7z [adeltux] [-] [SWITCH] <code><ARCHIVE_NAME> <ARGUMENTS></code>
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</pre>
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Here some useful options that we will use to explain some examples:
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<ul>
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<li><i>a</i> Add</li>
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<li><i>d</i> Delete</li>
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<li><i>e</i> Extract</li>
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<li><i>l</i> List</li>
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<li><i>t</i> Test</li>
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<li><i>u</i> Update</li>
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<li><i>x</i> Extract with full paths</li>
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</ul>
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The simplest way to use <code>7z</code> if we want to extracts all files from archive archive.zip to the current directory.
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<pre>
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7z e archive.zip
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</pre>
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Well, now we talk about the switches.
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There are many type of switches, we will see the most common ones.
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<h1>-m (Set compression Method)</h1>
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<p>Specifies the compression method</p>
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<pre>
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-m<method_parameters>
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</pre>
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The format for this switch depends on the archive type which are:
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<ul>
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<li>Zip</li>
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<li>GZip</li>
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<li>BZip2</li>
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<li>7z</li>
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<li>XZ</li>
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<li>WIM</li>
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</ul>
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<h1>-r (Recurse subdirectories) switch</h1>
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<p>Specifies the method of treating filenames or wildcards on the command line.</p>
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The syntax:
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<pre>
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-r[- | 0]
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</pre>
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<table>
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<tr>
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<td> Switch </td>
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<td> Description </td>
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</tr>
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<tr>
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<td> -r </td>
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<td> Enable recurse subdirectories </td>
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</tr>
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<tr>
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<td> -r- </td>
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<td> Disable recurse subdirectories. This is the default option. </td>
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</tr>
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<tr>
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<td> -r0 </td>
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<td> Enable recurse subdirectories only for wildcard names </td>
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</tr>
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</table>
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<p>
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If we want to list all *.doc files that belong to the archived root directory in the <i>archive.zip</i> archive, we can do as follows:
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</p>
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<pre>
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7z l archive.zip *.doc -r-
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</pre>
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<h1>-p (Set password) switch</h1>
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<p>Specifies a password</p>
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Here the syntax is very simple:
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<pre>
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-p{password}
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</pre>
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If we want to protect some files we can compress for example all *.txt files to archive.7z using a password as "cimbale".
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<pre>
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7z a archive.7z -pcimbale
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</pre>
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Then if we want to extracts all files from archive.7z we need the password "cimbale".
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<pre>
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7z x archive.7z -pcimbale
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</pre>
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<h1> -x (Exclude filenames) switch </h1>
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<p>
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Specifes which filenames or wildcards must be excluded from the operation.
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</p>
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Syntax:
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<pre>
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-x[<recurse_type>]<file_ref>
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</pre>
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Sometimes we need to add files into an archive.7z, except one, this can be done as fllows:
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<pre>
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7z a -tzip archive.7z *.txt -x!temp.*
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</pre>
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<p>We described the most important swtiches and uses of this command, but there are more.</p>
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