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Command: cut | Section: 1 | Source: OpenBSD | File: cut.1
CUT(1) FreeBSD General Commands Manual CUT(1)
NAME
cut - select portions of each line of a file
SYNOPSIS
cut -b list [-n] [file ...]
cut -c list [file ...]
cut -f list [-s] [-d delim] [file ...]
DESCRIPTION
The cut utility selects portions of each line (as specified by list) from
each file and writes them to the standard output. If no file arguments
are specified, or a file argument is a single dash (`-'), cut reads from
the standard input. The items specified by list can be in terms of
column position or in terms of fields delimited by a special character.
Column and field numbering starts from 1; output is in the same order as
input, not in the order selected.
list is a comma or whitespace separated set of numbers and/or number
ranges. Number ranges consist of a number, a dash (`-'), and a second
number which 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.
The options are as follows:
-b list
The list specifies byte positions.
-c list
The list specifies character positions.
-d delim
Use the first character of delim as the field delimiter
character. The default is the <TAB> character.
-f list
The list specifies fields, separated by the field delimiter
character. The selected fields are output, separated by the
field delimiter character.
-n Do not split multi-byte characters. A character is written to
standard output if and only if the byte position holding its last
byte is selected.
-s Suppresses lines with no field delimiter characters. Unless
specified, lines with no delimiters are passed through
unmodified.
ENVIRONMENT
LC_CTYPE The character encoding locale(1). It decides which byte
sequences form characters. If unset or set to "C", "POSIX", or
an unsupported value, -c does the same as -b, -n has no effect,
and -d uses the first byte of delim.
EXIT STATUS
The cut utility exits 0 if all input files are output successfully, and
>0 if an error occurs.
EXAMPLES
Extract login names and shells from the system passwd(5) file as
"name:shell" pairs:
$ cut -d : -f 1,7 /etc/passwd
Show the names and login times of logged in users:
$ who | cut -c 1-8,18-30
SEE ALSO
awk(1), paste(1)
STANDARDS
The cut utility is compliant with the IEEE Std 1003.1-2008 ("POSIX.1")
specification.
HISTORY
A cut command first appeared outside Bell Labs in AT&T System III UNIX
and has been available since 4.3BSD-Reno.
AUTHORS
The original Bell Labs version was written by Gottfried W. R. Luderer and
the BSD version by Adam S. Moskowitz and Marciano Pitargue.
FreeBSD 14.1-RELEASE-p8 August 4, 2022 FreeBSD 14.1-RELEASE-p8