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- CUT(1) UNIX Programmer's Manual CUT(1)
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- NAME
- cut - cut out selected fields of each line of a file
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- SYNOPSIS
- cut -clist [file1 file2 ...]
- cut -flist [-dchar] [-s] [file1 file2 ...]
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- DESCRIPTION
- Use _c_u_t 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 _l_i_s_t
- 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 _t_a_b
- (-f option). _C_u_t can be used as a filter; if no files are
- given, the standard input is used.
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- The meanings of the options are:
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- _l_i_s_t A comma-separated list of integer field numbers,
- with optional - to indicate ranges as in the -o
- option of _n_r_o_f_f/_t_r_o_f_f for page ranges; e.g., 1,4,7;
- 1-3,8; -5,10 (short for 1-5,10); or 3- (short for
- third through last field).
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- -c_l_i_s_t The _l_i_s_t following -c specifies character positions
- (e.g., -c1-72 would pass the first 72 characters of
- each line).
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- -f_l_i_s_t The _l_i_s_t following -f is a list of fields assumed
- to be separated in the file by a delimiter charac-
- ter (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.
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- -d_c_h_a_r The character following -d is the field delimiter
- (-f option only). Default is _t_a_b. Space or other
- characters with special meaning to the shell must
- be quoted.
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- -s Suppresses lines with no delimiter characters in
- case of -f option. Unless specified, lines with no
- delimiters will be passed through untouched.
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- Either the -c or -f option must be specified.
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- HINTS
- Use _g_r_e_p(1) to make horizontal ``cuts'' (by context) through
- a file, or _p_a_s_t_e(1) to put files together column-wise (i.e.,
- horizontally). To reorder columns in a table, use _c_u_t and
- _p_a_s_t_e.
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- Printed 3/5/87 1
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- CUT(1) UNIX Programmer's Manual CUT(1)
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- EXAMPLES
- cut -d: -f1,5 /etc/passwd
- mapping of user IDs to names
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- name=`who am i | cut -f1 -d" "`
- to set name to current login name.
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- DIAGNOSTICS
- Error messages may come from getopt(3). All error messages
- contain limits for line and field lenghts.
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- SEE ALSO
- grep(1), paste(1). getopt(3)
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- Printed 3/5/87 2
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