Command: fold - fold long lines Syntax: fold [-n] [file] ... Flags: -n How long should the output lines be Examples: fold -60 # Fold stdin to 60 characters fold file # Fold file to 80 characters Fold takes copies its input from the named file (or stdin, if none is specified) to standard output. However, lines longer than the given maximum (default 80) are broken into multiple lines of the maximum length by inserting new line characters.