REV(1) User Commands REV(1) NAME rev - reverse lines characterwise SYNOPSIS rev [option] [file...] DESCRIPTION The rev utility copies the specified files to standard output, reversing the order of characters in every line. If no files are specified, standard input is read. This utility is a line-oriented tool and it uses in-memory allocated buffer for a whole wide-char line. If the input file is huge and without line breaks then allocating the memory for the file may be unsuccessful. OPTIONS -0, --zero Zero termination. Use the byte '\0' as line separator. -h, --help Display help text and exit. -V, --version Display version and exit. SEE ALSO tac(1) REPORTING BUGS For bug reports, use the issue tracker <https://github.com/util-linux/util-linux/issues>. AVAILABILITY The rev command is part of the util-linux package which can be downloaded from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils/util-linux/>. util-linux 2.41.2 2025-09-22 REV(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | REPORTING BUGS | AVAILABILITY
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