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User Commandscut(1)


NAME

 cut - cut out selected fields of each line of a file

SYNOPSIS

 cut -b list [-n] [file ...]
 cut -c list [file ...]
 cut -f list [-d delim] [-s] [file ...]

DESCRIPTION

 

Use the cut utility to cut out columns from a table or fields from each line of a file; in data base parlance, it implements the projection of a relation. The fields as specified by list can be fixed length, that is, character positions as on a punched card (-c option) or the length can vary from line to line and be marked with a field delimiter character like TAB (-f option). cut can be used as a filter.

Either the -b, -c, or -f option must be specified.

Use grep(1) to make horizontal ``cuts'' (by context) through a file, or paste(1) to put files together column-wise (that is, horizontally). To reorder columns in a table, use cut and paste.

OPTIONS

 

The following options are supported:

list
A comma-separated or blank-character-separated list of integer field numbers (in increasing order), with optional - to indicate ranges (for instance, 1,4,7; 1-3,8; -5,10 (short for 1-5,10); or 3- (short for third through last field)).
-b list
The list following -b specifies byte positions (for instance, -b1-72 would pass the first 72 bytes of each line). When -b and -n are used together, list is adjusted so that no multi-byte character is split.
-c list
The list following -c specifies character positions (for instance, -c1-72 would pass the first 72 characters of each line).
-d delim
The character following -d is the field delimiter (-f option only). Default is tab. Space or other characters with special meaning to the shell must be quoted. delim can be a multi-byte character.
-f list
The list following -f is a list of fields assumed to be separated in the file by a delimiter character (see -d ); for instance, -f1,7 copies the first and seventh field only. Lines with no field delimiters will be passed through intact (useful for table subheadings), unless -s is specified.
-n
Do not split characters. When -b list and -n are used together, list is adjusted so that no multi-byte character is split.
-s
Suppresses lines with no delimiter characters in case of -f option. Unless specified, lines with no delimiters will be passed through untouched.

OPERANDS

 

The following operands are supported:

file
A path name of an input file. If no file operands are specified, or if a file operand is -, the standard input will be used.

USAGE

 

See largefile(5) for the description of the behavior of cut when encountering files greater than or equal to 2 Gbyte (231 bytes).

EXAMPLES

 Example 1. Mapping user IDs
 

A mapping of user IDs to names follows:
 
example% cut -d: -f1,5 /etc/passwd

Example 2. Setting current login name
 

To set name to current login name:
 
example$ name=`who am i | cut -f1 -d' '`

ENVIRONMENT VARIABLES

 

See environ(5) for descriptions of the following environment variables that affect the execution of cut: LC_CTYPE, LC_MESSAGES, and NLSPATH.

EXIT STATUS

 

The following exit values are returned:

0
All input files were output successfully.
>0
An error occurred.

ATTRIBUTES

 

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPEATTRIBUTE VALUE
AvailabilitySUNWcsu
CSIEnabled

SEE ALSO

 

grep(1), paste(1), attributes(5), environ(5), largefile(5)

DIAGNOSTICS

 
cut: -n may only be used with -b
cut: -d may only be used with -f
cut: -s may only be used with -f
cut: cannot open <file>
Either file cannot be read or does not exist. If multiple files are present, processing continues.
cut: no delimiter specified
Missing delim on -d option.
cut: invalid delimiter
cut: no list specified
Missing list on -b, -c, or -f option.
cut: invalid range specifier
cut: too many ranges specified
cut: range must be increasing
cut: invalid character in range
cut: internal error processing input
cut: invalid multibyte character
cut: unable to allocate enough memory

SunOS 5.9Go To TopLast Changed 29 Apr 1999

 
      
      
Copyright 2002 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.