fold

fold [options ] [files ]

Break the lines of the named files so that they are no wider than the specified width. fold breaks lines exactly at the specified width, even in the middle of a word.

Options

-b

The line width specifies bytes, not characters. Solaris only.

-s

Break lines after the last whitespace character within the first width characters. Solaris only.

-w n

Create lines having width n (default is 80). (Can also be invoked as - n for compatibility with BSD.)