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=What is Linux?=
Linux is the result of merging the computational Kernel made by Linux Torval and the Unix operative system, Kernel was written from scratch by
Linux and a loosely-knit team of hackers across the Net. It aims towards POSIX and Single UNIX Specification compliance.
It has all the features you would expect in a modern fully-fledged Unix, including true multitasking, virtual memory, shared libraries, demand loading, shared copy-on-write executables, proper memory management, and multistack networking including IPv4 and IPv6.