rev

Reverse the text string "hello"

$ echo "hello" | rev

Reverse an entire file and print to stdout

$ rev [file]

rev [option] [file...]

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.

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

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

The rev command is part of the util-linux package and is available from https:// www.kernel.org /pub /linux /utils /util-linux/ Linux Kernel Archive .

tac(1)