High Quality Content by WIKIPEDIA articles! Yes is a Unix command, which outputs an affirmative response, or a user-defined string of text continuously until killed. By itself, the yes command outputs 'y' or whatever is specified as an argument, followed by a newline, until stopped by the user or otherwise killed; when piped into a command, it will continue until the pipe breaks (i.e., the program completes its execution). It can also be used to test how well a system handles high loads, as using yes results in 100% processor usage, for systems with a single processor (for a multiprocessor system, a process must be run for each processor). This, for example, can be useful for investigating whether a system's cooling system will be effective when the processor is running at 100%.

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