rev

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 than allocate the memory for the file may be
       unsuccessful.

OPTIONS
       -V, --version
           Display version information and exit.

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

SEE ALSO
       tac(1)

REPORTING BUGS
       For bug reports, use the issue tracker at
       https://github.com/karelzak/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 2.37.2                 2021-06-02                            REV(1)