cut - cut out selected fields of each line of a file
cut -b list [-n] [file...]
cut -c list [file...]
cut -f list [-d delim] [-s] [file...]
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
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
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)).
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.
The list following -c specifies character positions
(for instance, -c1-72 would pass the first 72 charac-
ters of each line).
The character following -d is the field delimiter (-f
option only). Default is tab. Space or other charac-
ters with special meaning to the shell must be quoted.
delim can be a multi-byte character.
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 char-
acter is split.
-s Suppresses lines with no delimiter characters in case
of -f option. Unless specified, lines with no delim-
iters will be passed through untouched.
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.
See largefile(5) for the description of the behavior of cut
when encountering files greater than or equal to 2 Gbyte (2
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' '`
See environ(5) for descriptions of the following environment
variables that affect the execution of cut: LANG, LC_ALL,
LC_CTYPE, LC_MESSAGES, and NLSPATH.
The following exit values are returned:
0 All input files were output successfully.
>0 An error occurred.
See attributes(5) for descriptions of the following attri-
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| Availability | SUNWcsu |
| CSI | Enabled |
| Interface Stability | Standard |
grep(1), paste(1), attributes(5), environ(5), largefile(5),
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 mul-
tiple 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
Man(1) output converted with