cut - Displays specified parts from each line of a file
cut -b list [-n] [file...]
cut -c list [file...]
cut -f list [-d delim] [-s] [file...]
Interfaces documented on this reference page conform to industry standards as follows:
cut: XPG4, XPG4-UNIX
Refer to the
reference page for more information
about industry standards and associated tags.
Cuts based on a list of bytes. Each selected byte is output, unless you also specify the -n option. For example, if you specify -b 1-72, the cut command writes out the first 72 bytes in each line of the file. Cuts based on a list of characters. It is not an error if you specify a character not in the input. Uses the specified character as the field delimiter (separator) when you specify the -f option. You must quote characters with special meaning to the shell, such as the space character. Any character can be used as delim. The default field delimiter is a tab character. Specifies a list of fields assumed to be separated in the file by a field delimiter character, specified by the -d option or the tab character by default. For example, if you specify -f 1,7, the cut command writes out only the first and seventh fields of each line. If a line contains no field delimiters, the cut command passes them through intact (useful for table subheadings), unless you specify the -s option. Does not split characters. When specified with the -b option, each element in list of the form low-high (hyphen-separated numbers) is modified as follows: If the byte selected by low is not the first byte of a character, low is decremented to select the first byte of the character originally selected by low. If the byte selected by high is not the last byte of a character, high is decremented to select the last byte of the character prior to the character originally selected by high, or zero (0) if there is no prior character. If the resulting range element has high equal to zero (0) or low greater than high, the list element is dropped from list for that input line without causing an error.
The path name of the file to be examined.
The cut command locates the specified fields in each line of the specified file and writes the characters in those fields to standard output.
You must specify the -b option (to select bytes), the -c option (to select characters) or the -f option (to select fields). The list argument (see the -b, -c, and -f options) must be a space-separated or comma-separated list of positive numbers and ranges. Ranges can be in three forms: Two positive numbers separated by a hyphen (-), as in the form low-high, which represents all fields from the first number to the second number. A positive number preceded by a hyphen (-), as in the form -high, which represents all fields from field number 1 to that number. A positive number followed by a hyphen (-), as in the form low-, which represents that number to the last field, inclusive.
The elements in list can be repeated, can overlap, and can be specified in any order.
Some sample list specifications are as follows: First, fourth, and seventh bytes or fields. First through third and eighth bytes or fields. First through fifth and tenth bytes or fields. Third through last bytes or fields.
The fields specified by list can be a fixed number of byte positions, or the length can vary from line to line and be marked with a field delimiter character, such as a tab character.
[Compaq] You can also use the
command to make
horizontal cuts through a file and the
put the files back together. To change the order of columns in a file, use
The following exit values are returned:
An error occurred.
To display several fields of each line of a file, enter: cut -f 1,5 -d : /etc/passwd
This displays the login name and full user name fields of the system password file. These are the first and fifth fields (-f 1,5) separated by colons (-d :).
So, if the /etc/passwd file looks like this:
su:UHuj9Pgdvz0J":0:0:User with special privileges:/: daemon:*:1:1::/etc: bin:*:2:2::/usr/bin: sys:*:3:3::/usr/src: adm:*:4:4:System Administrator:/usr/adm: pierre:*:200:200:Pierre Harper:/u/pierre: joan:*:202:200:Joan Brown:/u/joan:
Then, cut -f 1,5 -d : /etc/passwd produces this output:
su:User with special privileges daemon: bin: sys: adm:System Administrator pierre:Pierre Harper joan:Joan Brown
The following environment variables affect the execution of
Provides a default value for the internationalization variables
that are unset or null. If
is unset or null, the corresponding value from the default locale is used.
If any of the internationalization variables contain an invalid setting, the
utility behaves as if none of the variables had been defined.
If set to a non-empty string value, overrides the values of
all the other internationalization variables.
Determines the locale for the interpretation of sequences
of bytes of text data as characters (for example, single-byte as opposed to
multibyte characters in arguments and input files).
Determines the locale for the format and contents of diagnostic
messages written to standard error.
Determines the location of message catalogues for the processing
Commands: grep(1), fold(1), join(1), paste(1)