Can SQL Server call be made from unix sh

Hi,
I need to make SQL Server procedure call (exec <proc name>)from unix shell script. First of all I would like to know if it is possible. I know we can do it from Oracle but not sure about SQL Server.
Version:
SunOS 5.8
SQL 8.0

I have made the below entry in the interface file.
NSXNA267
query tcp ether NSXNA267.ibt.ibtco.com 1433
master tcp ether NSXNA267.ibt.ibtco.com 1433

When I give ->
isql -U <userid> -P <password> -S NSXNA267
I get the below error.
DB-LIBRARY error:
Unknown network type found in interface file.

isql -U <userid> -P <password> -S NSXNA267.ibt.ibtco.com
DB-LIBRARY error:
Server name not found in interface file.

Thanks,
Preethi