rev - reverse lines characterwise

       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 2.40.2                                  2024-01-31                                             REV(1)

       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.

       rev - reverse lines characterwise

-h, --help
           Display help text and exit.

       -V, --version
           Print version and exit.

       -0, --zeroZerotermination. Use the byte '\0' as line separator.

       For bug reports, use the issue tracker at https://github.com/util-linux/util-linux/issues.

tac(1)

rev [option] [file...]