A filename extension is a suffix to the name of a computer file applied to indicate the encoding convention (file format) of its contents. In some operating systems (for example Unix) it is optional, while in some others (such as Windows) it is a requirement. Some operating systems limit the length of the extension (such as DOS and OS/2, to three characters) while others (such as Unix) do not. Some operating systems (for example RISC OS) do not use file extensions.
Here you have most popular extensions:
.$$$ Temporary file
.$$A OS/2 program file
.$$F OS/2 database file
.$$S OS/2 spreadsheet file
.$D$ OS/2 planner file
.$DB DBASE IV temporary file
.$ED Microsoft C temporary editor file.
.$VM Microsoft Windows temporary file for virtual managers.
Thinks that you need to install on your Ubuntu for a Look like Leopard OS X:
Psi is a free instant messaging application designed for the Jabber IM network (including Google Talk). Fast and lightweight, Psi is fully open-source and compatible with Windows, Linux, and Mac OS X.
Whether you use Windows, Linux, or a Mac, Psi is right at home on your desktop. From the system tray icon on Windows to the dock badges on Mac OS X, Psi takes advantage of each operating system’s unique features and appearance to provide a first-class IM experience on almost any computer.
For all Ubuntu forum user here is a Firefox Extension to browse the ubuntu.forum much easier than ever. Ubuntu forums Menu offers you a fast navigation to topics and threads. The extension is not available for Firefox RC2 so you can bookmark and turn as soon as this is available.
Fedora 9 has been released: “The Fedora Project, a Red Hat sponsored and community-supported open source collaboration, today announced the availability of Fedora 9, the latest version of its open source operating system distribution. Highlights: PackageKit, a cross-distribution package management solution; GNOME 2.22; KDE desktop 4.0.3 featuring upgrades to core components such as the port to Qt 4; NetworkManager improvements; Firefox 3 Beta 5; SELinux confined web browser; OpenJDK6, the release of Sun Java SDK under a free and open source license; X.Org updates; consolidated dictionary support; Bluetooth enhancements; persistent live USB support; Upstart init daemon; ext4 file system support….” See the formal press release and read the comprehensive release notes for more information. Download the installable live CD images from here: Fedora-9-i686-Live.iso (691MB, SHA1, torrent), Fedora-9-i686-Live-KDE.iso (691MB, SHA1, torrent), Fedora-9-x86_64-Live.iso (693MB, SHA1, torrent), Fedora-9-x86_64-Live-KDE.iso (695MB, SHA1, torrent).
Linux isn’t very popular on the desktop. It’s a far third behind OS X, which is a very far second behind Windows. Most people cite pre-installed operating systems as the reason. But as a student of psychology, I see something most people don’t. There’s one big factor in why Linux isn’t popular on the desktop. Linux is free. I know this sounds like complete dog’s bollocks, but hear me out before judging my sanity.
We can all remember the story of Tom Sawyer. At one point, Tom had to whitewash a fence. When one of his friends happened along, Tom tried to persuade and bribe the friend to help him. Needless to say, it didn’t work.
A few moments later, as Tom was unhappily whitewashing the fence, another friend stumbled along to jeer at Tom’s misfortune. This time Tom decided on a cunning plan. He ignored the friend, and seemed very absorbed in the whitewashing. Soon the friend became intrigued, because what could be more interesting than talking to a friend? Shortly thereafter, he started begging Tom to let him whitewash a bit of the fence. Tom wouldn’t give in.
The friend offered Tom some of his most valuable possessions if Tom would just let him whitewash a little bit. Tom reluctantly agreed, secretly jumping with joy on the inside. More friends happened along, coming to laugh at Tom for having to whitewash a fence. Tom simply did his act, and they all stayed to help whitewash, and paid for the privilege!
The above story illustrates a basic human nature. We don’t value things we can get easily. Yet we’d climb mountains, cross rivers and travel across deserts just to reach something we can’t easily get our hands on.
The computer world
The same thing applies in the world of computers. Humans are naturally suspicious of that which comes too easily. Imagine you were promoting an expensive brand of champagne. If you were running around forcing free samples into people’s hands, they would be very wary. But if you set up a stand where you would offer small samples for $10 each (“Special promotional price! Normally costs three times as much!”), people would see your champagne as posh and valuable.
It’s still the same champagne. Yet your presentation radically changes people’s perception of it.
Which brings me to Linux. There’s one problem with Linux getting to new users. It’s free.
That’s right. Linux being free is a problem in reaching new customers.
Read more.. post by anamazingmind.com