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cat - concatenate files

cat [-] [file...]


The cat command reads each file in sequence and writes it on the standard output. The following command prints the file to standard output:

cat file The following command concatenates two files into a third:

cat file1 file2 >file3 If no file is given, or if minus (-) is given as an argument cat reads from the standard input.


Beware of cat a b >a and cat a b >b, which destroy input files before reading them.

See Also
read, write, stream - read, write, or stream file in Chapter 8

Integer File Descriptor in Chapter 8

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