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- Page 1 (last mod. 8/19/84)
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- CUT(1) UNIX 4.0 CUT(1)
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-
-
- NAME
- cut - cut out selected fields of each line of a file
-
- SYNOPSIS
- cut -clist [file1 file2 ...]
- cut -flist [-d char] [-s] [file1 file2 ...]
-
- DESCRIPTION
- Use cut 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, i.e., 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; if no files
- are given, the standard input is used.
-
- The meanings of the options are:
-
- list
- A comma-separated list of integer field numbers (in
- increasing order), with optional - to indicate ranges as in
- the -o option of nroff/troff for page ranges; e.g., 1,4,5;
- 1-3,8; -5,10 (short for 1-5,10P); or 3- (short for third
- through last field).
-
- -clist
- The list following -c (no space) specifies character
- positions (e.g., -c1-72 would pass the first 72 characters
- of each line).
-
- -flist
- The list following -f is a list of fields assumed to be
- separated in the file by a delimiter character (see -d);
- e.g., -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.
-
- -dchar
- 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.
-
- -s
- Supresses lines with no delimiter characters in case of -f
- option. Unless specified, lines with no delimiters will be
- passed through untouched.
-
- Either the -c or -f option must be specified.
-
- HINTS
- Use grep(1) to make horizontal "cuts" (by context) through a
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- Page 1 (last mod. 8/19/84)
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- CUT(1) UNIX 4.0 CUT(1)
-
-
-
- file or paste(1) to put files together column-wise (i.e.,
- horizontally). To reorder columns in a table, use cut and
- paste.
-
- EXAMPLESS
- cut -d: -f1,5 /etc/passwd
- mapping of user IDs to names
-
- name=`who am i | cut -f1 -d:`
- to set name to current login name
-
- DIAGNOSTICS
- line too long
- A line can have no more than 511 characters or fields.
-
- bad list for c/f option
- Missing -c or -f option or incorrectly specified list. No
- error occurs if a line has fewer fields than the list
- calls for.
-
- no fields
- The list is empty.
-
- SEE ALSO
- grep(1),paste(1).
-
- CAVEATS
- This program is a complete rewrite of the Bell Laboratories
- command of the same name; no part of the original source or
- manual is included. Therefore, you may feel free to use it,
- and its source, without violation of any contract
- agreements. However, I retain the copyright in order to
- specify it remain available for use by all and sundry,
- without cost. Feel free to modify as necessary, although I
- went to great pains to recreate the behavior of the original
- command; I would suggest this congruence be maintained.
-
- Along the same lines, although I've made a reasonable effort
- to test the more arcane behavior of the original cut and
- reproduce it, there are no guarantees. I remain in no way
- liable for any loss, either explicit or incidental, that may
- be incurred through use of this command. I do ask that any
- bugs (and, hopefully, fixes) be reported back to me as
- encountered. - David M. Ihnat, ihuxx!ignatz
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- Page 2 (last mod. 8/19/84)
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