Write the commands for given : a. To create a user U and add him to the group G in single command. b. To display all lines of a file not having the word Muscat or MUSCAT. c. To display 10th line of a file, assume file is having 12 lines. d. To remove all permissions to all users for a file F.

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Linux

An operating system (OS) is the software which manages hardware and resources, like CPU, storage and memory. The OS bridges the applications and hardware and makes the connections between all of your software and the hardware resources.