Well I got up this morning, tried it again and it worked.
The one thing different I noticed was that when typing 101 (for Philips HDD1630) the cursor was at the far left of the window whereas last night the cursor was after "user@debian:~/rockbox/build_hdd1630$".
Thanks.
I've zipped the file and extracted it to the player but when I switch it on its the usual philips firmware. When I connect the player to the PC I can see that no signs of rockbox are there.
Going by this post
http://forums.rockbox.org/index.php?topic=20861.0 is this what I have to do.
I've now got the rockbox folder on the player, I was'nt putting it into service mode. It's still not working. I probably need to change the philips firmware file to the rockbox firmware file but am too chicken to without a second opinion.

I went ahead and swapped the philips firmware with rockbox.mi4 but when I unplugged the player and restarted it, it said "Please connect player to pc". The service mode means I can restore files.
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I don't know how to post the complete log from the command line but I can see 2 errors:-
cat: /home/user/rockbox/build/apps/features: No such file or directory
and
sh: Line 1: /home/user/rockbox/tools/convbdf: No such file or directory
I extract the zipped rockbox folder from the user/debian/rockbox/build folder to the root of the players' drive but it still loads up the OF.
Any help much appreciated.
Got it working at last and it was of course my own stupidity
When I got to the point of pressing "B" for bootloader I was pressing "N" for normal, I had read it from this thread
http://forums.rockbox.org/index.php?topic=4689.0I should have stuck to the wiki.