About the reviewers

Michael Ernstoff is a Unix and Linux infrastructure and security specialist with over 25 years' experience. An independent consultant for 20 years, Michael has worked for many well-known blue-chip companies, mainly in the banking and finance industry. With extensive knowledge of host-based security, security hardening, and user and privilege management, Michael has developed and implemented solutions for Security & Regulatory Compliance and Identity Management. He is a keen amateur musician and has four children.

Vineet Tuli is currently working as a Senior Project Manager for a Telecom Services company in India. In this role, he is managing the company's technical side, overseeing a team of development, operations, and support people.

He has a total of 18 years' experience of developing applications in Linux and managing Linux servers. He has also imparted corporate training on Linux administration and Linux programming for around 10 years for companies in India and abroad.

He lives in Chandigarh with his wife and daughter and he is passionate about astronomy and photography.