Thanks Spakman now i can play with ruby on my n800...good work
guys just download
libruby1.8_1.8.6-p110-1_maemo4_armel.deb
ruby1.8_1.8.6-p110-1_maemo4_armel.deb
ruby1.8-maemo_0.4.0_maemo4_armel.deb
irb1.8_1.8.6-p110-1_maemo4_all.deb

and install it in the sequence above
you will have ruby and irb working perfectly on maemo os 2008

thanks again mr Spakman
jags