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TAC(1) NetBSD General Commands Manual TAC(1)
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tac -- display file in reverse
tac [file ...]
tac (cat backwards) outputs the contents of each of each of the specified
files, or the standard input if no files are specified, in reverse line
order to the standard output.
The tac utility exits 0 on success, and >0 if an error occurs.
The tac utility doesn't support any of the options of GNU tac.
NetBSD 9.2 October 1, 2017 NetBSD 9.2