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Wednesday, October 12, 2011

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In The Beginning Computer systems didn’t talk to each other Operating systems were bound to specific hardware Upgrading involved rewriting existing programs AND data Wednesday, October 12, 2011

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1965 Multics Bell Labs decided to build an operating system that should provide: simultaneous access to multiple users Good processing power High level data storage Wednesday, October 12, 2011

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1969 The End Of Multics After 4 years of research, Multics did not match project goals Bell labs management decided to stop all work on the system Wednesday, October 12, 2011

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But ... not all was lost Wednesday, October 12, 2011

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The Unix Team A small group of engineers decided not to give up “We didn’t want to lose the pleasant niche we occupied”. -- Dennis Ritchie Wednesday, October 12, 2011

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It was the summer of 69 Wednesday, October 12, 2011

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Coding Unix While Ken Thompson’s family went on their summer vacation, he and Dennis Ritchie stayed in the office to work Dennis Ritchie Wednesday, October 12, 2011

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4 Weeks Later Wednesday, October 12, 2011

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A Job Well Done A working operating system A working shell A working text editor A working assembler Wednesday, October 12, 2011

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Unix Philosophy Write programs that do ONE thing well Write programs that work together Write programs that handle text streams Wednesday, October 12, 2011

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The Unix Man Pages All Unix systems are bundled with the system’s manual Every program needed a manual page to get into Unix DEMO: man cat Wednesday, October 12, 2011

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Sharing Is Caring 1975 and on, Unix was distributed under a cheap academic license 1976-1977 Thompson teaches OS at Berkley After he left, students and other teachers began developing BSD Unix Wednesday, October 12, 2011

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From School To Work 1984 Onwards. Commercial Unix Wednesday, October 12, 2011

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Commercial Unix Until 1984, AT&T was forbidden to sell computer software due to monopoly regulations In 1984, AT&T and Bell Labs split. Bell took the phone and AT&T turned to AT&T Computer Systems AT&T Began selling Unix System V Other companies bought the Unix source and modified it to their specific hardware (Sun, SGI, HP, IBM) Wednesday, October 12, 2011

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Unix & Free Software The GNU Project Started by Richard Stallman on 1984 The Goal: “Bring back the cooperative spirit that prevailed in the computing community in earlier days” By 1990, they were almost ready Richard Stallman Wednesday, October 12, 2011

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GNU Project Status By 1990, All major components were written The missing piece - A working kernel Wednesday, October 12, 2011

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And Then Came Linux Started as a kernel development project by Linus Torvalds Distributed as a free software “home brew” unix Wednesday, October 12, 2011

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GNU Linux OS Anyone can develop their own distro GNU/Linux is everywhere Used by small and large companies alike Wednesday, October 12, 2011

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Notable Linux Distros Debian Ubuntu Slackware Fedora, Red Hat, CentOs Wednesday, October 12, 2011

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Patrick Volkerding Wednesday, October 12, 2011

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Story Of Unix Unix Is Simple Unix Is Fun Unix Is Designed For Developers Unix Is Widely Spread Wednesday, October 12, 2011

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Q & A Wednesday, October 12, 2011

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Thank You Ynon Perek ynonperek@yahoo.com ynonperek.com Wednesday, October 12, 2011