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<div class="section" id="unix-specific-services">
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<span id="unix"></span><h1>Unix Specific Services<a class="headerlink" href="#unix-specific-services" title="Permalink to this headline">¶</a></h1>
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<p>The modules described in this chapter provide interfaces to features that are
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unique to the Unix operating system, or in some cases to some or many variants
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of it. Here’s an overview:</p>
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<div class="toctree-wrapper compound">
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="posix.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">posix</span></code> — The most common POSIX system calls</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="posix.html#large-file-support">Large File Support</a></li>
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<li class="toctree-l2"><a class="reference internal" href="posix.html#notable-module-contents">Notable Module Contents</a></li>
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</ul>
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</li>
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<li class="toctree-l1"><a class="reference internal" href="pwd.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">pwd</span></code> — The password database</a></li>
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<li class="toctree-l1"><a class="reference internal" href="spwd.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">spwd</span></code> — The shadow password database</a></li>
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<li class="toctree-l1"><a class="reference internal" href="grp.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">grp</span></code> — The group database</a></li>
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<li class="toctree-l1"><a class="reference internal" href="crypt.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">crypt</span></code> — Function to check Unix passwords</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="crypt.html#hashing-methods">Hashing Methods</a></li>
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<li class="toctree-l2"><a class="reference internal" href="crypt.html#module-attributes">Module Attributes</a></li>
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</ul>
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<li class="toctree-l1"><a class="reference internal" href="termios.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">termios</span></code> — POSIX style tty control</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="termios.html#example">Example</a></li>
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</ul>
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</li>
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<li class="toctree-l1"><a class="reference internal" href="tty.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">tty</span></code> — Terminal control functions</a></li>
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<li class="toctree-l1"><a class="reference internal" href="pty.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">pty</span></code> — Pseudo-terminal utilities</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="pty.html#example">Example</a></li>
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</ul>
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<li class="toctree-l1"><a class="reference internal" href="fcntl.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">fcntl</span></code> — The <code class="docutils literal notranslate"><span class="pre">fcntl</span></code> and <code class="docutils literal notranslate"><span class="pre">ioctl</span></code> system calls</a></li>
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<li class="toctree-l1"><a class="reference internal" href="pipes.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">pipes</span></code> — Interface to shell pipelines</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="pipes.html#template-objects">Template Objects</a></li>
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</ul>
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</li>
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<li class="toctree-l1"><a class="reference internal" href="resource.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">resource</span></code> — Resource usage information</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="resource.html#resource-limits">Resource Limits</a></li>
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<li class="toctree-l2"><a class="reference internal" href="resource.html#resource-usage">Resource Usage</a></li>
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</ul>
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</li>
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<li class="toctree-l1"><a class="reference internal" href="nis.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">nis</span></code> — Interface to Sun’s NIS (Yellow Pages)</a></li>
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<li class="toctree-l1"><a class="reference internal" href="syslog.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">syslog</span></code> — Unix syslog library routines</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="syslog.html#examples">Examples</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="syslog.html#simple-example">Simple example</a></li>
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title="previous chapter"><code class="xref py py-mod docutils literal notranslate"><span class="pre">winsound</span></code> — Sound-playing interface for Windows</a></p>
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<p class="topless"><a href="posix.html"
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title="next chapter"><code class="xref py py-mod docutils literal notranslate"><span class="pre">posix</span></code> — The most common POSIX system calls</a></p>
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