143 lines
5.2 KiB
HTML
143 lines
5.2 KiB
HTML
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<html>
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<head>
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<title>DiskUsage</title>
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</head>
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<body bgcolor=#ffffff>
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<br>
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<br>
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<h2><img src="icon.png"> <code>DiskUsage</code><br>
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Volume Utilization Visualizer</h2>
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<hr>
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<h3>What is it?</h3>
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<code>DiskUsage</code> shows a graphical representation of how the space on your
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volumes is utilized. It uses concentric circles to represent different levels
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in the file system hierarchy. It is useful for answering the question, "Where
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has all my disk space gone?" And sometimes it's fun just to look at the
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pictures. <p>
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Here is a picture of <code>DiskUsage</code> in action, so to speak. <p>
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<center><img src="home.png"></center> <p>
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The circle in the middle represents my <code>/boot/home</code> directory.
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Each segment of the ring immediately outside that circle represents a file or
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directory within <code>/boot/home</code>. And so on.
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<h3>Usage</h3>
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<strong>Startup.</strong> You can launch <code>DiskUsage</code> from the
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<code>Tracker</code>, either directly or by dropping a volume or folder on its
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icon; or from the <code>Terminal</code>, optionally passing the names of one
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or more files or folders as arguments. If you launch <code>DiskUsage</code>
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without specifying a volume, it will wait until you drop one or more volumes
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or folders on its window or select a volume from the menu. <p>
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While <code>DiskUsage</code> is scanning a volume, it displays a status bar
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showing its progress. Multiple volumes are scanned in parallel (each in its
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own thread). You can view the progress on a volume by selecting that volume
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from the menu. <p>
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<strong>The main display.</strong> When <code>DiskUsage</code> finishes scanning
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a volume, it displays a graphical representation of the volume's files and
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directories. As you move the mouse over each part of the picture, information
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about each file or directory appears in the area at the bottom of the window.
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You can resize the window to increase or decrease the number of levels that
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<code>DiskUsage</code> displays. <p>
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<strong>Zooming.</strong> You can "zoom" in on a directory by clicking the
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primary mouse button on it. The picture is redrawn with that directory in the
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center circle. You can zoom out one level by clicking the center circle. At
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the outermost level, the center circle represents the volume itself, showing
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free and used space as pie slices. <p>
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<strong>Pop-up menu.</strong> Clicking the secondary mouse button on a part
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of the picture pops up a menu with <code>Tracker</code>-like options
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applicable to that file or directory. For directories, the menu includes an
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option to rescan that directory and its subdirectories (not the entire
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volume). This is useful since <code>DiskUsage</code> does not monitor changes
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to the file system. <p>
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<strong>Drag-and-drop.</strong> You can drag files and directories from
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<code>DiskUsage</code> to other applications (or to the desktop, the trash, etc.)
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with the primary mouse button. You can drop volumes and folders on
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<code>DiskUsage</code>'s window to zoom directly to them. <p>
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<strong>Other controls.</strong> The buttons in the top right corner of the
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<code>DiskUsage</code> window rescan the selected volume and display the
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documentation (this file). <p>
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<strong>Notes:</strong>
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<ul>
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<li> If the graphical representation of a file or directory comprises less
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than about two degrees of a circle, it is excluded from the display.
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<li> The number of files that <code>DiskUsage</code> reports for a directory
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includes files in subdirectories too. A directory counts as a file.
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<li> <code>DiskUsage</code> ignores symbolic links.
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<li> If you don't like the colors <code>DiskUsage</code> uses, you can change
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them with your favorite resource editor.
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</ul>
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<h3>Credits, etc.</h3>
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Thanks to Steffen Gerlach for creating the Windows
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<a href="http://www.steffengerlach.de/freeware/index.html">Scanner</a>
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utility, from which I took the idea for using concentric circles to represent
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disk usage. <p>
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Thanks to the <a href="http://www.vim.org/">Vim</a> development team for
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creating the best programmer's editor on the planet, with which
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<code>DiskUsage</code>'s original code and documentation were lovingly
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hand-crafted. <p>
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Thanks to the folks at <u><font color=#0000ff>B</font><font
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color=#ff0000>e</font></u> for creating such a kick-butt OS. It has made
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programming fun again. <p>
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Thanks to Mike Steed for doing the programming. All the code is original. <p>
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<code>DiskUsage</code> used to be called <code>guido</code> by it's original
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author. The name <code>guido</code> originated from GUI + <code>du</code>
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-- the command-line disk usage utility. Plus, one of his favorite languages,
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<a href="http://www.python.org/">Python</a>, was created by a fine programmer
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named Guido.
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<h3>Known problems</h3>
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<ul>
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<li> You can drop multiple volumes or folders on the icon, but
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<code>DiskUsage</code> sees only one of them. Why?
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<li> Dropping a floppy disk volume on <code>DiskUsage</code>'s window works, but
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dropping it on the icon does not work (unless you force it by holding the Ctrl
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key while you drag). <em>Why?!</em>
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</ul>
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<h3>License</h3>
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<code>DiskUsage</code> is Copyright (c) 1999 Mike Steed. You are free to use
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and distribute this software as long as it is accompanied by this documentation
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and copyright notice. The software comes with no warranty, etc. <p>
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<hr>
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</body>
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</html>
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