You have just run this syntax to start the listener from the Listener Control utility:
LSNRCTL>START
Starting /mstgelai/oracle/bin/tnslsnr: please wait…
System parameter file is /u01/oracle/network/admin/listener.ora Log messages written to /u01/oracle/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=stc-sun01-server)(PORT=1521))) Connecting to…
The command completed successfully
What is the name of the Listener you started?()