try "man rdev"
the -R is a switch.
>
> I was reviewing the linux-newbies FAQ and the discussion of how to make a
> boot disk. I've also compared it to the HOWTO for making a boot disk,
> http://metalab.unc.edu/mdw/HOWTO/Bootdisk-HOWTO.html, and I am confused.
>
> If I type rdev-R /dev/fd0 1, exactly what does that do? Tell the floppy
> it's the boot disk? Tell my Linux box that the floppy is a boot disk?
>
> I checked the man pages and rdev-R isn't even listed.
>
> I already created a boot disk with mkbootdisk, but I assume this is a
> non-standard feature of RH5.2, and I'm wondering what I really need to do.
>
> Thanks in advance.
>
>