rev(1) — Linux manual page

REV(1)                        User Commands                        REV(1)

NAME         top

       rev - reverse lines characterwise

SYNOPSIS         top

       rev [option] [file...]

DESCRIPTION         top

       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         top

       -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         top

       tac(1)

REPORTING BUGS         top

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

AVAILABILITY         top

       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/>. This page is
       part of the util-linux (a random collection of Linux utilities)
       project. Information about the project can be found at 
       ⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you have a
       bug report for this manual page, send it to
       util-linux@vger.kernel.org. This page was obtained from the
       project's upstream Git repository
       ⟨git://git.kernel.org/pub/scm/utils/util-linux/util-linux.git⟩ on
       2025-08-11. (At that time, the date of the most recent commit that
       was found in the repository was 2025-08-05.) If you discover any
       rendering problems in this HTML version of the page, or you
       believe there is a better or more up-to-date source for the page,
       or you have corrections or improvements to the information in this
       COLOPHON (which is not part of the original manual page), send a
       mail to man-pages@man7.org

util-linux 2.42-start-521-ec46  2025-08-09                         REV(1)

Pages that refer to this page: tac(1)

HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH.