Konstantin Ryabitsev is the system administrator for kernel.org which provides the computing infrastructure behind the collaborative development and official distributions of the Linux source code.
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Brian Behlendorf is a technologist and open source evangelist best known for his role as the primary developer of the Apache Web Server. Apache quickly became the most popular web server software on the Internet. Behlendorf also founded the Apache Software Foundation which supports the development of hundreds of open source software projects.
Robert Fabry was a professor of computer science at the University of California, Berkeley who orchestrated funding for the development of the BSD operating system. Fabry secured grants from the Defense Advanced Research Projects Agency (DARPA) enabling him to create Berkeley’s Computer Systems Research Group (CSRG) and formalize the development of BSD.
Eric Allman is a computer programmer who created the sendmail mail transport agent. The software allowed for the delivery of email to computers connected to the Internet and quickly became the defacto standard on Unix-like systems. Allman also created syslog which became the standard logging solution for applications running under Unix-like systems.