my qustion is,
nis is centralised server.how to login nis user in client system in console (CDE)login
Follow : NIS FAQ to make the workstation a nis client, then ensure that the passwd, group and hosts lines in /etc/nsswitch.conf list nis after files (or copy nsswitch.nis to nsswitch.conf).
HTH
Try to make the other computer as NIS client.
Login with the local root.
Check if passwd, group data are shared:
to check this, run below cmd's on client machine:
#ypcat passwd | grep username
#ypcat group | grep username
If you get the real output, then try to login by first logging out with root.