These docs are under active development and cover the v0.20 Kobicha security model.
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fold

fold breaks long lines so that none exceeds a fixed width. Every line longer than the limit is cut into pieces.

fold [options] [file...]

$ fold -w 80 wide.txt

By default fold wraps at 80 columns, and it cuts at exactly that column — even in the middle of a word. That hard cut is the difference between fold and fmt: fmt reflows paragraphs and breaks between words; fold just enforces a width, mechanically. Use fold when you need a guarantee that no line is wider than N; use fmt when you want the result to read well.

With no file, fold reads standard input.

Options

Option Effect
-w, --width=WIDTH Wrap at WIDTH columns instead of 80.
-s, --spaces Break at a space within the width where one exists, rather than mid-word — a gentler wrap.
-b, --bytes Count bytes rather than display columns. Control characters such as tab and newline then count as ordinary bytes.
-c, --characters Count character positions rather than display columns.

Exit status

Code Meaning
0 Success.
1 A file could not be read, or the width was invalid.

See also