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.Dd October 8, 2015
.Dt FOLD 1
.Os sbase
.Sh NAME
.Nm fold
.Nd wrap lines to width
.Sh SYNOPSIS
.Nm
.Op Fl bs
.Op Fl w Ar num | Fl Ns Ar num
.Op Ar file ...
.Sh DESCRIPTION
.Nm
reads each
.Ar file
and prints its lines wrapped such that no line
exceeds a certain width.
If no file is given,
.Nm
reads from stdin.
.Sh OPTIONS
.Bl -tag -width Ds
.It Fl b
Count bytes rather than characters.
.It Fl s
If a line contains spaces, break
at the last space within width.
.It Fl w Ar num | Fl Ns Ar num
Break at
.Ar num
characters.
The default is 80.
.El
.Sh STANDARDS
POSIX.1-2013.
.Pp
The
.Op Fl Ns Ar num
syntax is an extension to that specification.
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