1.\" Copyright (c) 1980, 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.Dd June 23, 2020 29.Dt COLRM 1 30.Os 31.Sh NAME 32.Nm colrm 33.Nd remove columns from a file 34.Sh SYNOPSIS 35.Nm 36.Op Ar start Op Ar stop 37.Sh DESCRIPTION 38The 39.Nm 40utility removes selected columns from the lines of a file. 41A column is defined as a single character in a line. 42Input is read from the standard input. 43Output is written to the standard output. 44.Pp 45If only the 46.Ar start 47column is specified, columns numbered less than the 48.Ar start 49column will be written. 50If both 51.Ar start 52and 53.Ar stop 54columns are specified, columns numbered less than the 55.Ar start 56column 57or greater than the 58.Ar stop 59column will be written. 60Column numbering starts with one, not zero. 61.Pp 62Tab characters increment the column count to the next multiple of eight. 63Backspace characters decrement the column count by one. 64.Sh ENVIRONMENT 65The 66.Ev LANG , LC_ALL 67and 68.Ev LC_CTYPE 69environment variables affect the execution of 70.Nm 71as described in 72.Xr environ 7 . 73.Sh EXIT STATUS 74.Ex -std 75.Sh EXAMPLES 76Show columns below 3 (c) and above 5 (e): 77.Bd -literal -offset indent 78$ echo -e "abcdefgh\en12345678" | colrm 3 5 79abfgh 8012678 81.Ed 82.Pp 83Specifying a start column bigger than the number of columns in the file is 84allowed and shows all the columns: 85.Bd -literal -offset indent 86$ echo "abcdefgh" | colrm 100 87abcdefgh 88.Ed 89.Pp 90Using 1 as start column will show nothing: 91.Bd -literal -offset indent 92$ echo "abcdefgh" | colrm 1 93 94.Ed 95.Sh SEE ALSO 96.Xr awk 1 , 97.Xr column 1 , 98.Xr cut 1 , 99.Xr paste 1 100.Sh HISTORY 101The 102.Nm 103utility first appeared in 104.Bx 1 . 105.Sh AUTHORS 106.An Jeff Schriebman 107wrote the original version of 108.Nm 109in November 1974. 110