Is firewall like pfsense needed for installation of suricata in Ubuntu at enterprise level.As I see most of Ubuntu suricata videos where with help of pfsense.Please suggest me some videos which help me to install suricata in Ubuntu
You don’t need pfsense.
Try the quick start docs if you want to get your feet wet https://suricata.readthedocs.io/en/suricata-6.0.0/quickstart.html#installation
Suricata is a little complicated, I’m not sure you will able to do an enterprise deployment without investing some time into reading and understanding the docs and the configuration file.