The cat command is a standard Unix program used to concatenate and display files. The name is from catenate, a synonym of concatenate.
The Single Unix Specification specifies the behavior that the contents of each of the files given in sequence as arguments will be written to the standard output in the same sequence, and mandates one option, -u, where each byte is printed as it is read.
If the filename is specified as -, then cat will read from s...
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