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When I login to the unix db machine and run the command to connect to oracle database
sqlplus db_login_id/db_login_password.
I get error:
ORA-12545: Connect failed because target host or object does not exist
However I can connect to the server using TOAD…so the target definitely exists.
What should be my troubleshooting checklist
1) ping the host, 2) check DNS settings, 3) check that the username doesn’t need a fully qualified domain name (e.g. kaudshik@whatever.com vs kaudshik)