What one line command accomplishes the following in Ubuntu - Linux: The output of who is passed to a utility that both writes to its output, which is connected to sort, and at the same time, writes a copy of its input to a new file named who.out. The output from sort is passed to a utility that both writes to its output, connected to the input of a process running wc, and writes to a new file, sort.out. Finally, the wc utility outputs the number of lines, words and characters in the sorted who to the screen.

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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.