This is a fairly unimportant question which has been bugging me for the last few days: I'm using a dual boot system. Why, in the boot menu, does my Linux install appear twice? I have Scientific Linux 3.0.3 and Windows XP installed. The boot menu appears thus:

Scientific Linux (2.4.21-20.ELsmp)
Scientific Linux-up(2.4.21-20.EL)
Windows XP

What's the difference between the first two? I seem to remember seeing something similar when i set up Fedora previously (Fedora didn't work, which i'm not going to go into, which is why i switched to SciLinux).

On a related note, how can i edit the boot settings? At the moment i only get about 10 seconds before it boots into the default, which is a bit too short a time imo. Think i'm using grub (but couldn't swear to the truth of that).

Thanks if you can shed any light on this!

The first one is for multi-CPU machines¡A if you have only one CPU then you can safely delete it.
For GRUB the config file is /boot/grub/menu.lst (or grub.conf), its fairly straight forward you should be able to figure out what to edit in there easily.

If it doesn't work or the file does not exist, then you have LILO, the config file is /etc/lilo.conf by defalt.

This will sound pretty stupid, but i don't actually know if i have more than one cpu! I didn't build the computer myself, it's a standard build under contract - Windows claims there are two CPUs, but it wouldn't be the first time i've seen it claim that (on other computers) when it wasn't true! How can i find out under Linux? I had a quick look in the system tools the other day but didn't see anything immediately obvious...

Thanks for the help so far!

"cat /proc/cpuinfo" should tell you

The boot loader is grub, fixed that now. I'm still a bit mystified about the CPU thing, according to /proc/cpuinfo there are two processors, but they both have the same physical ID. The computer's pretty new and has a P4 with hyperthreading, so maybe that's what's causing the confusion. Not that it really matters!

Thanks again!