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cut

remove sections from each line of files

References

  • man cut

Quickstart

cut -f 1,3 -d ':' --output-delimiter=', ' file
# -f 1,3    : Show fields of column 1 & 3
# -d ':'    : Split by ':' (delimiter)
# --output-delimiter ', ' : Use ', ' as field delimiter

# e.g.
sed 's/#.*//' /etc/group | cut -f 2-3 -d ':' --output-delimiter=', '
# -f 2-3    : Show fields from column 2 to 3 (range)
sed 's/#.*//' /etc/group | cut -f 1-2,4 -d ':' --output-delimiter=', '
# -f 2-3,4  : Show fields from column 1 to 2 and of column 4 (multiple ranges)

Synopsis

cut OPTION... [FILE]...

With no FILE, or when FILE is -, read standard input.

Options

Split

  • -b, --bytes=LIST Select only these bytes
    • -n With -b: Don't split multibyte characters
  • -c, --characters=LIST Select only these characters
  • -f, --fields=LIST Select only these fields; also print any line that contains no delimiter character, unless the -s option is specified
    • -d, --delimiter=DELIM Use DELIM instead of TAB for field delimiter
  • --complement Complement the set of selected bytes, characters or fields

Output

  • --output-delimiter=STRING use STRING as the output delimiter the default is to use the input delimiter
  • -s, --only-delimited Do not print lines not containing delimiters

LIST

  • Use one, and only one of -b, -c or -f.
  • Each LIST is made up of one range, or many ranges separated by commas.
  • Selected input is written in the same order that it is read, and is written exactly once.

Each range is one of:

  • N N'th byte, character or field, counted from 1
  • N- From N'th byte, character or field, to end of line
  • N-M From N'th to M'th (included) byte, character or field
  • -M From first to M'th (included) byte, character or field

Usage

Delimiter

Default delimiter : TAB

  • Option =d' ' : Set DELIMITER to WHITE_SPACE below

Fields

Sample

$ cat sample
No Name Mark Remark
01 tom 59 AZ
02 jack 77 XP
03 alex 97 CC

Single

$ cut -f 1 -d' ' sample
No
01
02
03

Multi

$ cut -f 2,4 -d' ' sample
Name Remark
tom AZ
jack XP
alex CC

Range

-M

From first to M

$ cut -f -2 -d' ' sample
# or
$ cut -f-2 -d' ' sample
# or
$ cut -f'-2' -d' ' sample

No Name
01 tom
02 jack
03 alex
N-

From N to last

$ cut -f 3- -d' ' sample
# or
$ cut -f3- -d' ' sample
# or
$ cut -f'3-' -d' ' sample

Mark Remark
59 AZ
77 XP
97 CC
N-M

From N to M

$ cut -f 2-3 -d' ' sample
# or
$ cut -f2-3 -d' ' sample
# or
$ cut -f'2-3' -d' ' sample

Name Mark
tom 59
jack 77
alex 97

Inverse Selection

$ cut -f 2 --complement -d' ' sample
# exclude column 2
No Mark Remark
01 59 AZ
02 77 XP
03 97 CC

Char

$ cut -c 4 sample
N
t
j
a

Bytes

Sample 2

$ cat sample2
No Name Mark Remark
01 何冰 59 AZ
02 字节 77 XP
03 数量 97 CC

Default

$ cut -b 2 sample2
o
1
2
3

Multibyte Char

Notice : something wrong!

$ cut -b 4 sample2
N

Option -b with -n : Don't split multibyte characters

$ cut -b4 -n sample2
N
何
字
数

Output

Custom Delimiter

$ cut -f1- -d' ' --output-delimiter=';' sample
No;Name;Mark;Remark
01;tom;59;AZ
02;jack;77;XP
03;alex;97;CC

Filter

Sample 3

$ cat sample3
No Name Mark Remark
01 何冰 59 AZ
02 字节 77 XP
03 数量 97 CC
04空隙11JK

Do not print lines not containing delimiters

$ cut -f1- -d' ' -s sample3
No Name Mark Remark
01 何冰 59 AZ
02 字节 77 XP
03 数量 97 CC