Reverse characters in each line of a file.
rev [ File ... ]
The rev command copies the named files to standard output, reversing the order of characters in every line. If you do not specify a file, the rev command reads standard input.
To reverse characters in each line of a file, enter:
rev file
If the file file contains the text:
abcdefghi 123456789
then the rev command displays:
ihgfedcba 987654321
| /usr/bin/rev | Contains the rev command. |
Input and Output Redirection Overview in AIX Version 4.3 System User's Guide: Operating System and Devices.