Having issue with TNS setup.
(/u01/app/oracle/product/11.2.0/dbhome_1/network/admin/samples)
When tried with
>netca
I am getting "port already in use" tried alternate ports but still no luck
>lsnrctl status
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
TNS-12543: TNS:destination host unreachable
TNS-12560: TNS:protocol adapter error
TNS-00513: Destination host unreachable
Linux Error: 101: Network is unreachable
Thanks,