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How to reverse a string in command line

rev
pacman created at9 months ago view count: 191

command

echo 'hello world'  | rev

result

dlrow olleh

rev

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.  

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