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Four Linux Live CDs, The Executive Summary
prostoalex writes "ExtremeTech published a review of 4 Linux live distributions that do not require installation and run off a CD. Knoppix, Feather Linux, Gnoppix and MEPIS Linux were researched, with Knoppix winning the competition (and Gnoppix not graded, since it's still in beta)." One more (of the seemingly infinite number of live distros) I've recently tried and been happy with is called Slax, and is what it sounds like -- a live Slackware distribution. Slax worked great with my finicky older Toshiba laptop. (However, slax.org appears to be down.)
The speed of live CDs is becoming less of an issue as RAM sizes get larger. On my 512Mb notebook, Knoppix runs just fine.
What I find more interesting than "standard Linux on a CD" is the concept of packaging a specific application along with a live CD. For example, the systemrescueCD boots up and gives a good set of tools for doing backups/restores of your disks.
What works for backup/restore also works for games, demos, even large-scale applications that do not require intensive local data storage. The advantage of a live CD based on something like Knoppix is that it will run on practically any PC out there, booting in less time than it would normally take to install and configure.
There is little reason why a lot of software should be hard-installed onto PCs, and many reasons why it's a pain in lots of cases.
The counter argument is that "yes, but I want to be able to switch back from my game to my other applications." But this ignores the huge market for single-purpose kiosk-style systems, in home, in shops, and in business.
I would estimate that 30% or more of all PCs run only a few specific applications, and that most of the future expansion is into kiosk-style areas where live CDs are a perfect answer.
Why is this interesting? Because Linux has a significant lead in this technology mainly thanks to Knoppix. Thus a large part of Linux's future growth may well come from a native technology, which is much nicer than trying to win market share by imitating Windows.
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Here are some instances I can think of:
- home entertainment systems
- small office use (with data saved on network disk)
- education and training (data on USB drives)
- standardized corporate desktops (data on network)
- cybercafe workstations
- point-of-sale terminals
- industrial kiosks
- voting systems
- automated tellers
- DJ workstations
- application demos (both standalone and interactive)
- games
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At LinuxWorld last week, John "Mad Dog" Hall gave an excellent talk that, among other recommendations, made a crucial point about introducing newcomers to Linux:
This is the problem I've seen with distros like Knoppix - while they're great resources for experienced Linux users who want to have all of their favorite tools available anywhere, the number of apps is too much for newbies to handle. If you want to turn someone off Linux, just tell them "Well, for word processing you could use Abiword, or KWord, or OpenOffice. And look, you can use Dillo, or Mozilla, or Konqueror, or Firebird as your web browser. Isn't this great!" - I guarantee eyes will rapidly glaze over. The "let them explore the CD" approach is no better - the menus are cluttered and unintuitive to the newcomer, and the plethora of application interfaces with wildly different visual styles and conventions will finish confusing and scaring them.
If you really want to introduce people to Linux using a LiveCD, I recommend taking the time to make a custom CD that carefully selects a subset of the available applications that will be both interesting and accessible to your audience. This is actually quite easy and fun to do, starting from Knoppix (or Damn Small Linux, or Morphix, or...), and is one of the most useful things you can do to help Linux gain acceptance by a broader audience.