I'm not sure what old linux is, but I think it's carried over after a fresh install... it doesn't really have any value. Re-installing Lilo will immediatly remove that option. As for LinuxNonFB I can't be positive what it is, but I think it's a more secure form of Linux.
non-fb - already answered by Haywire.
old_linux - yes, it's the old boot. It's really for people who install a new kernel. As you all know, you don't "upgrade" kernels by upgrading them, you do it by adding a new kernel (if you have any sense). That way, if things don't work out as planned, you still have a kernel too boot from, and that is "linux_old". If used this trick in reverse when the kernel that came with a new distro didn't play nice with my hardware - I upgraded, then booted from the old kernel. And of course it is vital for those intrepid souls who want to install development kernels.
Sir Robin
-- "I declare this sentence a performative!"
Robin Turner IDMYO Bilkent Univeritesi Ankara 06533 Turkey
www.bilkent.edu.tr/~robin
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