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About the reviewers
Rafael David Tinoco
 is an Ubuntu Linux core developer. He currently holds 
the position of Ubuntu Server engineer at Canonical, the company behind Ubuntu 
Linux. He is also a member of the Ubuntu Developer Membership Board. 
Rafael is a Linux developer and he has worked for the past 20 years in companies 
such as Linaro (Linux kernel upstream development/validation engineer for ARM 
and High Performance Computing (HPC) effort Tech Lead), Canonical (Linux 
Sustaining Engineer and Tech Lead), IBM (Mainframe Lab Engineer and Tech Lead, 
with a brief residency at the s390x performance team), Red Hat (Solution Architect), 
Locaweb (Linux/Email DevOps), Sun Microsystems (Consultant, Systems Engineer, 
HPC Engineer, and Solaris Ambassador).
Rafael has taken the roles of his career from field engineering positions—in constant 
contact with customers and critical mission environments—into pure engineering 
ones, focused in Linux internals, userland, kernel and general OS, and performance 
debugging and bug solving.
I would like to thank my wife, Patricia, without whose support I wouldn't 
be here and would not have produced so much in life—including this book 
review—my kids, Matheus and Giovanna, for teaching me so much every 
day, and Canonical for allowing me to participate in this book review. 
Thanks also to Packt, for inviting me on such a great experience, and to Jay 
LaCroix for making this book an incredible journey for those who want to 
learn about Ubuntu Linux as a server.
Dawn Bott's
 IT career began in a 911 dispatch center as the Dispatch Coordinator. 
Some of her duties included updating all computers in the police cruisers, providing 
desktop support for all machines in the center, and resolving any other IT issues that 
came up in day-to-day operations. When the 911 dispatch center was taken over by 
the county, she decided to continue her career in the IT world.
She took a job at a global technology solutions provider that supplied services to 
the automotive industry. She began on the helpdesk, working with dealerships 
to troubleshoot diagnostic tools and network issues as a level 1 technician, before 
quickly moving to team lead.
While working on the helpdesk, she went back to school and earned two associate 
degrees in Technological Sciences and Computer Support Engineering technology, 
gaining a Cisco Certificate of Achievement.

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Once her degree programs were complete, she was promoted to Technical Services 
System Administrator. She also began assisting the cloud team and working with 
AWS, and was eventually transferred to the cloud team full time.
After 6 years she moved to Go2Group as a Cloud Architect, where she was reunited 
with co-workers from a previous employer. Go2Group has since merged with 
Adaptavist and she is still currently with the company. This is the first book that 
Dawn has worked on, and it was a great experience.
I want to thank Jay LaCroix for writing this book and for allowing me the 
pleasure of assisting with the editing process, my husband, Harry, for his 
patience during this process, and Packt Publishing for all their support.

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