hello, im new to DBA and i im using kali linux for oracle sql developer, i have installed developer from the oracle site and when i try to establish connection it says no listener at localport 1521 this is the error:
Status : Failure -Test failed: ORA-12541: Cannot connect. No listener at host localhost port 1521. (CONNECTION_ID=1wbMrWdjQdeRiPzwFdWK8Q==)
https://docs.oracle.com/error-help/db/ora-12541/
can anybody help because i have tried many things and no AI and no YT tutorial really worked