Hi I'm a new user of linux. I have a dual boot. that is winXP and red hat linux 9. But when I formatted the c drive the linux is gone. there is no sign of linux to boot. Please help.
thank you.

If your Linux installation was on your "C drive" (that's a Windows term") and you formatted it, then of course it won't be there any more. You'll need to reinstall it if that's the case.

If you mean something like you installed Windows after Linux and the bootloader overwrote GRUB/LILO, then you should be able to boot your installation from one of your Red Hat CDs and reinstall the bootloader. Not sure how to do that with Red Hat though. Also, you might wanna consider getting a newer distribution as Red Hat 9 is seriously out of date!

Moved: This thread is more suitable in Linux - General and has been moved accordingly to help your thread/question get the exposure it deserves.

If you deleted the C drive I'm assuming Windows was using its own partition. Otherwise you may locate your Linux from within a live-CD easily, or with Redhat's own CD's. You'd only need to reinstall the bootloader. If you were using LILO, (likely with RH9), then mount your linux partition and run "lilo -c /mnt/linux/etc/lilo.conf"

Also, you could use chroot to temporarily "be" in your linux partition as if it were lonely mounted.

thanks for the reply pal, but I use a GRUB so please tell me how to install GRUB.