This document contains the professional summary and details of Biswajit Nayak. He has over 5 years of experience working as a Linux Administrator at Tech Mahindra. Some of his key responsibilities include handling outage calls, performing troubleshooting according to ITIL guidelines, managing users and file systems, and coordinating with internal and external teams to resolve issues. He has extensive experience working with technologies like Unix, Linux shell scripting, Perl scripting, and monitoring tools like Nagios.