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

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

       -V, --version
           Print version and exit.

       -0, --zero
           Zero termination. Use the byte '\0' as line separator.

SEE ALSO         top


REPORTING BUGS         top

       For bug reports, use the issue tracker at

AVAILABILITY         top

       The rev command is part of the util-linux package which can be
       downloaded from Linux Kernel Archive
       <>. This page
       is part of the util-linux (a random collection of Linux
       utilities) project. Information about the project can be found at
       ⟨⟩. If you have
       a bug report for this manual page, send it to This page was obtained from the
       project's upstream Git repository
       ⟨git://⟩ on
       2023-12-22. (At that time, the date of the most recent commit
       that was found in the repository was 2023-12-14.) 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

util-linux 2.39.594-1e0ad      2023-07-19                         REV(1)

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