I have a DS3100 that was running ultrix.  I had put netbsd on
another disk a few months ago.  My ultrix system disk died and I decided
to go back to netbsd.  I booted up the netbsd and decided that
I should upgrade the disk to the current distribution. I downloaded
the current distribution to my linux machine and then ftp'ed the
base.tar.gz to the Decstation.  Not thinking very clearly (this is
before I had breakfast), I untarred the base.  Now all the commands
core dump.  This I presume is because everything is elf and my 
kernel isn't.  

I am now left with a running machine that I'm logged in as root with only
a couple of commands that work, tar, gunzip, no ftp, no ls, rm or other
favorite commands.  Echo * does work so I can get directory listings.  I
can copy files by tarring onto a floppy disk.  I transferred netbsd.elf by
tarring it up on the linux machine to a floppy and untarring it in the
root directory.  Now, my question is, if I reboot will it come up or do I
need to change things in the startup scripts also? I can transfer any
number of files using floppies if I have to, but once I reboot I will be
stuck if it doesn't come up. 

Any and all advice will be appreciated, I'm going to go have breakfast
now.