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This article mainly explains "the usage of the Linux basic command join". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn the usage of the basic Linux command join.

Join

Find the same fields in the two files, merge the two files according to the same fields, and display the merge results to standard output.

The scope of this command: RedHat, RHEL, Ubuntu, CentOS, SUSE, openSUSE, Fedora.

1. Grammar

Join [options] file1 file2

2. List of options

Option

Description

-- version

Display command version information

-- help

Show help documentation

-a 1 or 2

Display lines that do not have the same fields in the file

-e string

If the specified string cannot be found in the file, fill in the string in the option in the output

-I |-- ignore-case

Ignore case

-j FIELD

Equivalent to "- 1 FIELD-2 FIELD"

-o format

Displays the results in the specified format

-t CHAR

Specify delimiter

-v 1 or 2

Same as-a, but only lines that do not have the same fields are displayed

-1 FIELD

Connect the fields specified in file 1

-2 FIELD

Connect the fields specified in file 2

-- check-order

Check that the input is sorted correctly, even if all input lines are repairable.

-- nocheck-order

Do not check whether the input is sorted correctly

3. Examples

1) merge two files into standard output

[root@192 weijie] # cat 1.c 2.c / / View the file

Hello world

I am david

Love linux

This code

Nihao ed

Hello linux

I am weijie

Love world

Hehe

Im join

[root@192 weijie] # join 1.c 2.c / / merge the same line

Hello world linux

I am david am weijie

Love linux world

2) display rows without the same field

[root@192 weijie] # join 1.c 2.c-v 1 / / displays lines in file 1 that do not have the same field

This code

Nihao ed

[root@192 weijie] # join 1.c 2.c-v 2 / / displays lines that do not have the same field in file 2

Hehe

Im join

At this point, I believe you have a deeper understanding of "the use of the Linux basic command join". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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