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| <h1>rsync</h1> |
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| <div id="preamble"> |
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| <div class="paragraph"> |
| <p><code>rsync</code> is basically the only copy command you’ll ever need on a linux/unix system. |
| It can copy in the same machine or across machines. |
| It can retain file permissions and owners. |
| You can run it over and over again say if the first execution failed or if there are new files to be copied over.</p> |
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| </div> |
| <div class="sect1"> |
| <h2 id="_same_machine_copy">same machine copy</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p><code>rsync -av fromdir/ todir/</code></p> |
| </div> |
| <div class="paragraph"> |
| <p>Will copy the contents of <code>fromdir/</code> to the directory <code>todir/</code></p> |
| </div> |
| <div class="paragraph"> |
| <p>To make a little example, some fancy bash syntax for creating a directory structure.</p> |
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| <div class="literalblock"> |
| <div class="content"> |
| <pre>$ mkdir -p one/{green,blue}/{square,circle}{1..3} |
| $ find . |
| . |
| ./one |
| ./one/blue |
| ./one/blue/circle1 |
| ./one/blue/circle2 |
| ./one/blue/circle3 |
| ./one/blue/square1 |
| ./one/blue/square2 |
| ./one/blue/square3 |
| ./one/green |
| ./one/green/circle1 |
| ./one/green/circle2 |
| ./one/green/circle3 |
| ./one/green/square1 |
| ./one/green/square2 |
| ./one/green/square3</pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>So to copy <code>one</code> to a new directory <code>two</code> we just do this</p> |
| </div> |
| <div class="paragraph"> |
| <p><code>rsync -av one/ two/</code></p> |
| </div> |
| <div class="paragraph"> |
| <p>Which gives us this as output</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-console" data-lang="console">$ rsync -av one/ two/ |
| building file list ... done |
| created directory two |
| ./ |
| blue/ |
| blue/circle1/ |
| blue/circle2/ |
| blue/circle3/ |
| blue/square1/ |
| blue/square2/ |
| blue/square3/ |
| green/ |
| green/circle1/ |
| green/circle2/ |
| green/circle3/ |
| green/square1/ |
| green/square2/ |
| green/square3/ |
| |
| sent 301 bytes received 110 bytes 822.00 bytes/sec |
| total size is 0 speedup is 0.00</code></pre> |
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| </div> |
| <div class="paragraph"> |
| <p>Now we have the following directory structure:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre>$ find . |
| . |
| ./one |
| ./one/blue |
| ./one/blue/circle1 |
| ./one/blue/circle2 |
| ./one/blue/circle3 |
| ./one/blue/square1 |
| ./one/blue/square2 |
| ./one/blue/square3 |
| ./one/green |
| ./one/green/circle1 |
| ./one/green/circle2 |
| ./one/green/circle3 |
| ./one/green/square1 |
| ./one/green/square2 |
| ./one/green/square3 |
| ./two |
| ./two/blue |
| ./two/blue/circle1 |
| ./two/blue/circle2 |
| ./two/blue/circle3 |
| ./two/blue/square1 |
| ./two/blue/square2 |
| ./two/blue/square3 |
| ./two/green |
| ./two/green/circle1 |
| ./two/green/circle2 |
| ./two/green/circle3 |
| ./two/green/square1 |
| ./two/green/square2 |
| ./two/green/square3</pre> |
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| <h2 id="_beware_the_slashes">beware the slashes</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>There’s a strange thing when not using the slashes at the end. |
| To keep things sane, just always use the slashes at the end of the two file paths and things will always be easy to remember.</p> |
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