Dual boot

You must to boot Your Linux from emergency diskette and reconfigure LILO. Because Windows installation (and upgrade) is writing information to the MBR and by that destroing Your LILO, because it is sitting in the MBR too.

hi sir,
it appears that you have installed win 98 again on your comp which has deleted the lilo boot loader on your harddisk.windows has a tendency of doing that .
now you have two options only
if you have a bootable linux disk u can boot to linux and configure your lilo again by liloconf command to start lilo from MBR or you have to again install linux .
microsoft products have a tendency to think that they are only os on pc and they writte mbr each time we install them.

If you did make a boot disk during the installation, you will be able to boot into linux and run as normal. Mount the install CD and check out the online manual for instructions to restore LILO.
Good Luck :)

Install BootMagic in Win 98. It should pick up all bootable OS. It comes with Partition Magic 5.

I'm not certain if it does for Red Hat. It may depend on how you received your red hat software. When I installed Win98, my MBR got hosed as well. I just put in my Slackware cd which is bootable, and at the boot prompt, entered my boot partition. I.E. /dev/hdb1 so that it booted me into my actual install, and from there, I just typed lilo.

in my experience, it is most efficient to use a slakware bootdisk (which is able, just like the CD) to boot from a HD-partition (instructions are in the bootscreen). Why use a slackware disk? RH has disabled certain functions on their rescue/emergencyboot floppies, so that it not easy to use them to boot something ...
Next time, make a bootflop. It isn't ideal but it sure beats reinstalling everything.
When your system is up again, run lilo (without args). you don't need to reconfigure (win == win :) but you do need to reinstall it in the MBR