Linux Head Tail Cut command

==================head==================

The first 10 lines of the default output file contents

NAME

-Output the first part of the files

Synopsis (outline, abstract)

-head [option] ... [File] ...

Parameters

-N Specify row

-C--bytes

-V Show file name

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#显示前5行

Head-n 5/etc/inittab

Head-5/etc/inittab #只需要掌握这条命令即可

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#显示前5个字节

Head-c 5/etc/inittab

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#除去最后10行, all other content is output

Head-n -10/etc/inittab

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#同时查看多个文件的前10行

Head/etc/inittab/etc/services

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#显示文件的文件名

Head-v/etc/inittab

==================tail==================

The following 10 lines of the default output file contents

NAME

-Output the last part of the files

Synopsis

-tail [option] ... [File] ...

Parameters

-N Specify row

-F--follow

Output appended data as the file grows

-------------------------------

#显示后5行

Tail-5/etc/inittab

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#动态实时的显示文件的内容

Tail-f Test.log

Tailf Test.log

#tailf是单独的命令: Follow the growth of a log file

==================cut==================

Cut: The Cut command defaults to the TAB key as the delimiter, but only supports a single separator!

NAME

-Remove sections (section) from each line of files

Synopsis

-Cut option ... [File] ...

Parameters

-B--bytes bytes

-C--characters Character

#1个英文字符 = 1 bytes

#1个中文字符 = 2 bytes

-D--delimiter Specifies the delimiter (by default, the TAB key is the separator)

-F--fields Specifies the segmented area (used with the-D parameter)

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#练习素材

echo "I am Oldboy my qq is 1234567" >test.txt

-------------------------------

#按字节切割 (cut by character Similarly, if you have Chinese, be sure to specify the-c parameter, otherwise garbled)

Cut-b 3 Test.txt

Cut-b 3-4 Test.txt

Cut-b-4 Test.txt

Cut-b 4-test.txt

Cut-b 1,4-test.txt

Cut-b -4,4-test.txt

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#切割出来指定的域

Head-1/etc/passwd|cut-d:-f4

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#修改练习素材

Cat >test.txt<<eof

This isthetab line.

This was space line.

#把tab键显示出来

Cat-t test.txt #参数T: Show Tab key ^i

Sed-n 1 test.txt #参数n: Cancel default output parameter L: print invisible character \ t (tab) $ (space)

#cut命令默认是以tab键作为分割符 (the awk command defaults to a space as a separator)

Cut-f2-3 Test.txt

#指定空格为分割符

Cut-d '-f2-3 test.txt

#注意: The Cut command supports only single separators!

This article is from the "Chen was 007" blog, please be sure to keep this source http://chenfage.blog.51cto.com/8804946/1840936

Linux Head Tail Cut command