Xinerama is the old general way to set up multi-headed X so that thingsactually knew that you had more than one display. In Fedora 8, many carddrivers (including radeon , the driver for ATI cards) have switched tousing the XRandR extension.

The Fedora 8 GUI configuration tools don't know anything aboutRandR-based dual-head configuration; if you try to use them anyways,nothing helpful happens. In theory you can do all of it on the fly with xrandr ; in practice this

I have been looking at the web server logs lately, which is usuallyan activity that's calculated to put me into a grumpy mood. As aresult of this, I have decided to write down in one place my technicalrequirements for web spiders, the direct things that I expect them to doand not do.

(This is excludes issues of basic functionality, like correctly parsingHTML, resolving relative links, and making correct HTTP requests, andbasic proper web spider behavior like respecting robots.txt .)

When you're considering using hashes as indexes, people can wind upsaying that collisions aren't going to be a problem because the hashesare cryptographically sound. At such times, it's important to rememberthe distinction between deliberate hash collisions and accidental hashcollisions.

The distinction between deliberate hash collisions and accidentalones is that an accidental hash collision is one that just happens,while a deliberate hash collision is one that can be produced by anattacker. All hashes that are shorter than their inputs necessarilyhave accidental

Linux virtual terminals have a simple conceptual model; you hit Alt-Fnand the kernel switches you to virtual terminal n. It even works with X,except that you have to remember to hit Ctrl-Alt-Fn when you're in X toswitch out of it. What I suspect many people don't know is that in thecase of X this simple conceptual model is a bit of a lie.

The issue is that text VTs and the X server VT are in different graphicsmodes, so