Usually you get this error if the you are trying to using showmount command to see the available nfs shares on your remote nfs server.


[root@client ~]# showmount -e 192.168.85.1
clnt_create: RPC: Program not registered

If the nfs service is runnging on your remote nfs server, you get this error on your client machine after running showmount command.To resolve this issue, just check if the nfs service is running on your server or not
[root@manny ~]# /etc/init.d/nfs status
rpc.svcgssd is stopped
rpc.mountd is stopped
nfsd is stopped
rpc.rquotad is stopped

Simply restart the nfs service on server and also make it start at startup using chkconfig command

[root@server ~]# /etc/init.d/nfs restart
[root@server ~]# chkconfig nfs on