interm: add md5, fs: add du

git-svn-id: svn+ssh://atelier.inf.usi.ch/home/bevilj/group-1@225 a672b425-5310-4d7a-af5c-997e18724b81

site/pages/cmd/interm/md5.html

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+---
+layout: page
+category-title: Intermediate commands
+category-page: intermediate
+tags: integrity checksum
+author: Joey Bevilacqua
+title: md5
+---
+
+The command <code>md5</code> calculates an unique string for each input given as
+argument using the <i>md5</i> algorithm.
+
+<pre>
+md5 [flags] [arg1] [arg2]
+</pre>
+
+Where [flags] are the (optional) md5 flags, read below for more info,
+and [arg1], [arg2] are the path for files or string (depending on the flags).
+
+Example: md5 sum of the string <i>Hello there</i>
+
+<pre>
+md5 -s "Hello there"
+    MD5 ("Hello there") = e8ea7a8d1e93e8764a84a0f3df4644de
+</pre>
+
+<h3>Flags</h3>
+
+<ul>q
+    <li><b>-s</b>: computes the md5 sum of a string instead of a file</li>
+    <li><b>-q</b>: prints the md5 sum without the file or string name</li>
+    <li><b>-r</b>: reverses the format of the output</li>
+</ul>

site/pages/fs/du.html

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+---
+layout: page
+category-page: fs
+category-title: FileSystem
+tags: disk usage file size
+author: Joey Bevilacqua
+title: du
+---
+
+The <code>du</code> command is used to display files and directories sizes.<br>
+The name stands for <i>Disk Usage</i>.
+
+<pre>
+du [flags] [file1] [file2] [directory1] ...
+</pre>
+
+<h3>Flags</h3>
+
+<ul>
+    <li><b>-a</b>: shows the size of each individual file inside a given folder,
+        not the folder total size.
+    </li>
+    <li><b>-c</b>: shows the total size of all the files passed as arguments</li>
+    <li><b>-d</b>: select the max depth of folder recursion</li>
+    <li><b>-h</b>: shows the sizes in an human-readable format</li>
+    <li><b>-g</b>: shows the sizes with GB units</li>
+    <li><b>-m</b>: shows the sizes with MB units</li>
+    <li><b>-k</b>: shows the sizes with KB units</li>
+</ul>