I found the solution myself.
1. quagga is running automatically. No need of any command to start and stop.
2. snmpd can be start and stop using systemctl command
systemctl enable --now snmpd
systemctl disable --now snmpd
3. sshd is running internally
you can check using ssh user_name@ipaddr
but process ID I am not able to check, as in "ps -ef" command I couldnot able to see the sshd running. But scp and ssh command is working