.TH NL 1 sbase\-VERSION
.SH NAME
sort \- sort lines
.SH SYNOPSIS
.B sort
.RB [ \-nru ]
.RB [ \-k
.I key
.R ]...
.RI [ file ...]
.SH DESCRIPTION
.B sort
writes the sorted concatenation of the given files to stdout.  If no file is
given, sort reads from stdin.
.SH OPTIONS
.TP
.B \-n
perform a numeric sort.
.TP
.B \-r
reverses the sort.
.TP
.B \-u
prints equal lines only once.
.TP
.B \-k key
specifies a key definition of the form \fBS\fR[.\fBs\fR][,\fBE\fR[.\fBe\fR]],
where
.B S,
.B s,
.B E,
and
.B e
are the starting column, starting character in that column, ending column and
the ending character of that column respectively.  If they are not specified,
s refers to the first character of the specified starting column, E refers to
the last column of every line, and e refers to the last character of that last
column.