URGENT: I destroyed bash
 

Thinking it was a directory, I tried to copy a shell script file to it, so I ended up overwriting /bin/bash. Now what do I do?! I'm lost..I'm afraid to turn off the computer.

-thanks in advance

Get the bash package and re-install it.

Thanks, but how do I do that? I can't even log in.

Just boot up with CD1. Mount your existing root partition (assuming it is hda1):
mount /dev/hda1 /mnt

Then copy the bash binary from the CD:
mv /mnt/bin/bash /mnt/bin/bash-script
cp /bin/bash /mnt/bin/

thanks! that did the trick.