John C Kennedy has worked with UNIX and Linux since 1998. He has worked with Nagios as a monitoring tool for much of the past 5 years.

He has been reviewing and tech-editing books in his spare time since 2001 and has about 20 open source books to his credit. He believes the best part of reviewing is that he learns something from every book he works on.

He was born in the USA and grew up in Northern Virginia, USA. He spent some time in the US Air Force and has lived in Germany and the UK. He has been married to Michele since 1994 and has two children, Denise and Kieran. He lives in Virginia.

Marco Ippolito is an Italian software engineer working as director of software development for Imagining IT. Marco completed his postgraduate in software engineering in Oxford and has worked for large corporations such as Google, Oracle, Intel, HP, and Dell, as well as for start-ups such as Platform.sh. He can be reached at [email protected] and has experience working in teams speaking Italian, English, Spanish, Brazilian Portuguese, German, and French, remotely or on-site.

Doug Ortiz is an experienced enterprise cloud, big data, data analytics, and solutions architect who has designed, developed, re-engineered, and integrated enterprise solutions. His other expertise is in Amazon Web Services, Azure, Google Cloud, business intelligence, Hadoop, Spark, NoSQL databases, and SharePoint, to mention a few.

He is the founder of Illustris, LLC and is reachable at [email protected].