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<div class="section" id="remote-exec-and-copy-commands">
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<h1>21. Remote exec and copy commands<a class="headerlink" href="#remote-exec-and-copy-commands" title="Permalink to this headline">¶</a></h1>
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<p>Cdist interacts with the target host in two ways:</p>
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<ul class="simple">
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<li>it executes code (__remote_exec)</li>
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<li>and it copies files (__remote_copy)</li>
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</ul>
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<p>By default this is accomplished with ssh and scp respectively.
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The default implementations used by cdist are:</p>
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<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">__remote_exec</span><span class="p">:</span> <span class="n">ssh</span> <span class="o">-</span><span class="n">o</span> <span class="n">User</span><span class="o">=</span><span class="n">root</span>
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<span class="n">__remote_copy</span><span class="p">:</span> <span class="n">scp</span> <span class="o">-</span><span class="n">o</span> <span class="n">User</span><span class="o">=</span><span class="n">root</span>
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</pre></div>
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<p>The user can override these defaults by providing custom implementations and
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passing them to cdist with the --remote-exec and/or --remote-copy arguments.</p>
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<p>For __remote_exec, the custom implementation must behave as if it where ssh.
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For __remote_copy, it must behave like scp.
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Please notice, custom implementations should work like ssh/scp so __remote_copy
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must support IPv6 addresses enclosed in square brackets. For __remote_exec you
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must take into account that for some options (like -L) IPv6 addresses can be
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specified by enclosed in square brackets (see <strong>ssh</strong>(1) and
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<strong>scp</strong>(1)).</p>
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<p>With this simple interface the user can take total control of how cdist
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interacts with the target when required, while the default implementation
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remains as simple as possible.</p>
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