141 lines
3.1 KiB
HTML
141 lines
3.1 KiB
HTML
---
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layout: page
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category-page: intermediate
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category-title: Intermediate commands
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tags: compress archive extract
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author: Andrea Brites Marto
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title: 7z
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next-page: pages/cmd/interm/apropos.html
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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
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know how to handle these files, but that is not a big deal because you can download for
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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
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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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<p>Well, now we talk about the switches.
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There are many type of switches, we will see the most common ones.</p>
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<h3>-m (Set compression Method)</h3>
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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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<h3>-r (Recurse subdirectories) switch</h3>
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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
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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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<h3>-p (Set password) switch</h3>
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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
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to archive.7z using a password as "cimbale".
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<pre>
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7z a archive.7z -p cimbale
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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 -p cimbale
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</pre>
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<h3>-x (Exclude filenames) switch </h3>
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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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