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 2025-03-17 rev(1)
util-linux 2.41 - Generated Thu May 8 07:56:55 CDT 2025