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+# rev(1)
+
+```sh
+# Reverse each line of file(s), character by character.
+rev FILE [FILE]
+
+echo -e '123\nabc' | rev
+# 321
+# cba
+```
+
+## Example: remove the last 2 tokens with unknown length
+```sh
+# If the number of tokens in a line is unkown but we want to remove the last 2
+# tokens we can use rev(1).
+echo 'aa bb cc dd' | rev | cut -d ' ' -f3- | rev
+# aa bb
+```