.\" Copyright (c) 1989, 1990, 1993 .\" The Regents of the University of California. All rights reserved. .\" .\" This code is derived from software contributed to Berkeley by .\" the Institute of Electrical and Electronics Engineers, Inc. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by the University of .\" California, Berkeley and its contributors. .\" 4. Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" @(#)cut.1 8.1 (Berkeley) 6/6/93 .\" $FreeBSD: src/usr.bin/cut/cut.1,v 1.23 2003/05/03 15:55:23 keramida Exp $ .\" .Dd June 6, 1993 .Dt CUT 1 .Os .Sh NAME .Nm cut .Nd select portions of each line of a file .Sh SYNOPSIS .Nm .Fl b Ar list .Op Fl n .Op Ar .Nm .Fl c Ar list .Op Ar .Nm .Fl f Ar list .Op Fl d Ar delim .Op Fl s .Op Ar .Sh DESCRIPTION The .Nm utility selects portions of each line (as specified by .Ar list ) from each .Ar file and writes them to the standard output. If no .Ar file arguments are specified, or a file argument is a single dash .Pq Sq Fl , .Nm reads from the standard input. The items specified by .Ar list can be in terms of column position or in terms of fields delimited by a special character. Column numbering starts from 1. .Pp The .Ar list option argument is a comma or whitespace separated set of increasing numbers and/or number ranges. Number ranges consist of a number, a dash .Pq Sq \- , and a second number and select the fields or columns from the first number to the second, inclusive. Numbers or number ranges may be preceded by a dash, which selects all fields or columns from 1 to the first number. Numbers or number ranges may be followed by a dash, which selects all fields or columns from the last number to the end of the line. Numbers and number ranges may be repeated, overlapping, and in any order. It is not an error to select fields or columns not present in the input line. .Pp The options are as follows: .Bl -tag -width indent .It Fl b Ar list The .Ar list specifies byte positions. .It Fl c Ar list The .Ar list specifies character positions. .It Fl d Ar delim Use the first character of .Ar delim as the field delimiter character instead of the tab character. .It Fl f Ar list The .Ar list specifies fields, delimited in the input by a single tab character. Output fields are separated by a single tab character. .It Fl n Do not split multi-byte characters. .It Fl s Suppress lines with no field delimiter characters. Unless specified, lines with no delimiters are passed through unmodified. .El .Sh ENVIRONMENT The .Ev LANG , LC_ALL and .Ev LC_CTYPE environment variables affect the execution of .Nm if the .Fl n option is specified. Their effect is described in .Xr environ 7 . .Sh EXAMPLES Extract users' login names and shells from the system .Xr passwd 5 file as .Dq name:shell pairs: .Pp .Dl "cut -d : -f 1,7 /etc/passwd" .Pp Show the names and login times of the currently logged in users: .Pp .Dl "who | cut -c 1-16,26-38" .Sh DIAGNOSTICS .Ex -std .Sh SEE ALSO .Xr paste 1 .Sh STANDARDS The .Nm utility conforms to .St -p1003.2-92 . .Sh HISTORY A .Nm command appeared in .Tn AT&T System III .Ux . .Sh BUGS The .Fl c option is a synonym for the .Fl b option, which causes incorrect behaviour in locales that support multibyte characters. .Pp When operating on fields .Fl ( f option is specified), .Nm does not recognise multibyte characters, and the .Ar delim character is recognised in the middle of multibyte sequences.