UNIX and Linux

~unix UNIX is not available for free, it is not open source, want to use must purchase authorization

In the early 1960s, MIT developed the first time-sharing operating system, CTSS (Compatible-sharing system), which pioneered the era of interactive, multi-user simultaneous use of computer resources. Supports 30 terminal access hosts

In 1965, Bell Labs joined a program by GE General Eletric and MIT mit to build a multi-user, multi-tasking, multi-layered multics system, which In order to support 300 terminal access hosts at the same time.

The plan was stopped until 1969 because of the slow pace of Multics's work. At that time, Ken Thompson had a program called "Star Trek" running on GE-635 's machine, but the reaction was very slow, and he found an idle Pdp-7,ken Thompson and Dernis Ritchie using assembly language to develop the file The Server system ported the "Star Trek" program to PDP-7 (Multics is actually "multiplexed information and Computing Service", which PDP-7 only supports two users, when , Brian Kernighan joked that their system was actually: "Uniplexed information and Computing Service", abbreviated as "UNICs", and later, everyone took its homophonic, called it "UNIX". Ken Thompson and Dernis Ritchie, also the Father of Unix and C language, invented C in 1973 and successfully rewritten the third edition of Unix with C language.

In 1977, Bill Joy of Berkeley (University of California, Berkeley) modified UNIX source code for his machine, called BSD (Berkeley software distribution)

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UNIX and Linux