Various features of Linux that are used in embedded systems are as follows :
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Linux is multiuser operating system.
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Linux is open source and free.
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Linux can be modified according to users requirements.
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Linux provides stability to embedded systems.
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Time to market for an embedded system is very quickly with embedded systems.
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Linux can be supported with various embedded system hardware.
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Development time and cost is very low which is very advantageous in an embedded system.
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Linux uses Portable Operating System Interface (POSIX).
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Linux has many interfaces for users.
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Linux supports handling of errors.
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Real-time Linux supports the group scheduling functions.