|CUT(1)||General Commands Manual||CUT(1)|
cut — select
portions of each line of a file
cut utility selects portions of each
line (as specified by list) from each
file and writes them to the standard output. If no
file arguments are specified, or a file argument is a
single dash (‘-’),
cut reads from the
standard input. The items specified by list can be in
terms of column position or in terms of fields delimited by a special
character. Column and field numbering starts from 1; output is in the same
order as input, not in the order selected.
list is a comma or whitespace separated set of numbers and/or number ranges. Number ranges consist of a number, a dash (‘-’), and a second number which select the fields or columns from the first number to the second, inclusive. Numbers or number ranges may be preceded by a dash, which selects all fields or columns from 1 to the first number. Numbers or number ranges may be followed by a dash, which selects all fields or columns from the last number to the end of the line. Numbers and number ranges may be repeated, overlapping, and in any order. It is not an error to select fields or columns not present in the input line.
The options are as follows:
cut utility exits 0 if all input files
are output successfully, and >0 if an error occurs.
Extract login names and shells from the system passwd(5) file as “name:shell” pairs:
$ cut -d : -f 1,7 /etc/passwd
Show the names and login times of logged in users:
$ who | cut -c 1-8,18-30
cut utility is compliant with the
IEEE Std 1003.1-2008 (“POSIX.1”)
|October 24, 2016||OpenBSD-current|