The cat program is a standard Unix utility that will output the contents of a specific file and can be used to concatenate and list files. The name is an abbreviation of catenate, a synonym of concatenate.

Cat is probably the oldest distinctively Unix utility.

cat command – UNIX commands

e.g.

cat command - UNIX commands

cat command - UNIX commands

If you was to see and print files in reverse you can use the tac command.

cat command - UNIX commands

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