The client suddenly out of the question: the client server error: TNS: 12541 no listener,
No oracle at the beginning of the service, the service
Linux on oracle listening state check error
TNS - 12535: TNS: operation timed out
TNS - 12560: TNS: protocol adapter error
TNS - 00505: the Operation timed out

Configuration to mend!

CodePudding user response:

Check to see if the firewall open,

 service iptables status 

CodePudding user response:

May be a firewall problem,