cat - concatenate files cat [ - ] [ file ... ] Cat reads each file in turn and writes it on the standard output. Thus .EX cat file

prints the file to standard output, and the following

.EX cat file1 file2 >file3

concatenates two files onto a third.

If no file is given, or where - is given as an argument, cat reads from the standard input. Output is buffered in blocks matching the input.

/appl/cmd/cat.b cp (1), stream (1) Beware of "cat a b >a" and "cat a b >b" which destroy input files before reading them.