Reverse the Contents of a File

The tail command can be used to reverse the contents of a file. Here's an example.

# cat > filename
THIS IS AN EASY WAY TO REVERSE THE CONTENT OF A FILE.
THE REVERSAL WILL DO MORE THAN 10 LINES. IT WILL REVERSE THE ENTIRE FILE.
EOM
.
# tail -r filename
.
EOM
THE REVERSAL WILL DO MORE THAN 10 LINES. IT WILL REVERSE THE ENTIRE FILE.
THIS IS AN EASY WAY TO REVERSE THE CONTENT OF A FILE.

By the way, this command line entry will do the same thing as tail -r.
# perl -e 'print reverse <>' filename