ERROR:ORA-12560: TNS: protocol adapter error
I have installed oracle in vmware RHEL-4 linux.I am able to ping the server but not able to login through command prompt.
I checked my tnsnames.ora and sqlnet.ora file was absolute fine.Even i create a oracle database in local machine and i was
able to connect to my local database,but i am not able to connect to that remote vmware machine database.
open the port 1521.As this port is disabled.I enable the port by entering below details.So that oracle able to connect.
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 1521 -j ACCEPT