install laserjet for postscript-pls help

["vinod abraham" <vinodab@xxxxxxxxxxx>]

Dear friends,
I am trying to install and get printout of postscript files on laserjet2100m
i have the following obsvns
1. ls >/dev/lp0 gives staircase printout.
2. ls | lpr gives
  unknown lpr printer.
3. when in ghostview print command gives
 lpr /root/gv_3aed129b_1_<filename>.tmp
No clues what's happening.
pls help
vinod
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