サーバーのよく使うコマンドメモ| cut

2015年3月2日

コマンド サーバー テクノロジー

Summery

ファイルの文字列から一部を切り出して表示する。

Construction

$ cut [option] [file]

Option

-b [位置] : バイト単位 -c [位置] : 文字数単位 -f [位置] : フィールド単位 -d [文字] : フィールド区切り文字の指定(デフォルト:tab)

Sample

# [hoge.txt] # aa,bb,cc,dd # 11,22,33,44 # --,~~,^^,$$ # テキストファイル「hoge.txt」の各行を","区切りで3番目のフィールドを表示 $ cut -d, -f3 hoge.txt

Discription

The cut utility cuts out selected 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 numbering starts from 1. The list option argument 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 and 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 last 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. If a field or column is specified multiple times, it will appear only once in the output. It is not an error to select fields or columns not present in the input line. The options are as follows: -b list The list specifies byte positions. -c list The list specifies character positions. -d delim Use delim as the field delimiter character instead of the tab character. -f list The list specifies fields, separated in the input by the field delimiter charac- ter (see the -d option.) Output fields are separated by a single occurrence of the field delimiter character. -n Do not split multi-byte characters. Characters will only be output if at least one byte is selected, and, after a prefix of zero or more unselected bytes, the rest of the bytes that form the character are selected. -s Suppress lines with no field delimiter characters. Unless specified, lines with no delimiters are passed through unmodified.