Hi Suresh,
To register sapstartsrv in the /usr/sap/services file you have to run the following:
/usr/sap/hostctrl/exe/saphostctrl -function RegisterInstanceService \
-sid <SID> -nr <instance number> -saplocalhost <hostname> \
-profile <path to instance start profile>
also please ensure the entry in services is
START_<SID>_<Instance_number>_<Hostname>:LD_LIBRARY_PATH=/usr/sap/<SID>/<Instance>/exe:$LD_LIBRARY_PATH; export LD_LIBRARY_PATH; /usr/sap/<SID>/<Instance>/exe/sapstartsrv pf=/usr/sap/<SID>/SYS/profile/START_<Instance>_<Hostname>
OR
LD_LIBRARY_PATH=/usr/sap/<SID>/<Instance>/exe:$LD_LIBRARY_PATH; export LD_LIBRARY_PATH; /usr/sap/<SID>/<Instance>/exe/sapstartsrv pf=/usr/sap/<SID>/SYS/profile/START_<Instance>_<Hostname>
Best Regards,
Atul