Kenneth Geisshirt is a chemist by education and a geek by nature. He has been programming for the last three decades. For more than 20 years, he has been using Unix and Linux as his primary operating system.

He is currently working at Realm, a small database company. He is working on language bindings (Python, Objective C, Node.js, and so on), and Git is an integrated tool in his daily work flow.

Kenneth has reviewed books on Vim, Linux system programming, and Octave. He has also written books on PAM and Linux, and numerous featured articles on open source software.

Shashikant Vaishnav was born and brought up in a desert town of Jodhpur, Rajasthan, India. He is currently a contract developer at Click Here Media, United Kingdom.

His research interests primarily focus on the areas of technology in education and developing software that takes into consideration the needs of elementary learners.

He has also been involved with Moodle LMS for quite a long time as a student. While being an undergraduate, he participated in Google's Summer of Code program and integrated Apache Solr with Moodle. He also participated as a mentor in the Google Code-in 2013 program for Sugar Labs.

He completed his undergraduate degree at Government Engineering College, Bikaner, with a Bachelor of Engineering and Technology in Computer Science in 2013. In college, he formed a group named LUGB (Linux User Group Bikaner).

Besides his academics focus, he harbors a deep interest for music and sports. He loves to blog about his experiences with open source technology, travel, and life. To allure himself at times, he reads spiritual books, does photography, and hacks around with open source stuff.