FOLD(1) General Commands Manual FOLD(1)
fold - fold long lines for display on an output device of a given width
fold [ -width ] [ file ... ]
Fold the contents of the specified files, or the standard input if no
files are specified, breaking the lines to have maximum width width.
The default for width is 80. Width should be a multiple of 8 if tabs
are present, or the tabs should be expanded using expand(1) before
Folding may not work correctly if underlining is present.
9 September 1987 FOLD(1)