Basic application of the SED of the Three Musketeers of Linux

SED: The second of the Three Musketeers
Implement add to file delete Modify query filter
Command format: SED option sed built-in command file
-I.
-E
-N
A
I
D
P
S
G
Create a file Tobedu.txt, enter the content, and take this file as an example.
[Email protected] ~]# cat-n tobyedu.txt
1 I am Toby teacher!
2 I like badminton Ball, billiard ball and Chinese chess!
3 Our site is tobyedu.com
4
5 my QQ num is 12345678.

1. Print 2 to 4 lines
   [Email protected] ~]# sed-n ' 2,4p ' tobyedu.txt
   I like badminton ball, billiard ball and Chinese chess!
   Our site is tobyedu.com

[Email protected] ~]#
2. Query for discontinuous rows, printing only lines 1th and 4th
[Email protected] ~]# sed-n ' 1p;4p ' tobyedu.txt
I am Toby teacher!

[[Email protected]~]#
3. Filters out rows that contain Toby strings.
[Email protected] ~]# sed-n '/toby/p ' tobyedu.txt
I am Toby teacher!
Our site is tobyedu.com
Delete a row containing a Toby string
[[Email protected] ~]# sed '/toby/d ' tobyedu.txt
I like badminton ball, billiard ball and Chinese chess!

My QQ num is 12345678.
4. Replace the Toby in the file with the Tobygirl
[[Email protected] ~]# sed ' s#toby#tobygirl#g ' tobyedu.txt
I am Tobygirl teacher!
I like badminton ball, billiard ball and Chinese chess!
Our site is tobygirledu.com

My QQ num is 12345678.
5. Replace all Toby strings in the file with Tobygirl and replace QQ number 12345678 with 87654321
[Email protected] ~]# sed-e ' s#toby#tobygirl#g ' tobyedu.txt-e ' s#12345678#87654321#g '
I am Tobygirl teacher!
I like badminton ball, billiard ball and Chinese chess!
Our site is tobygirledu.com

My QQ num is 87654321.
6. Append text I like Linux after the 2nd line of the Tobyedu.txt file.
[[Email protected] ~]# sed ' 2a i like Linux ' Tobyedu.txt
I am Toby teacher!
I like badminton ball, billiard ball and Chinese chess!
I like Linux
Our site is tobyedu.com

My QQ num is 12345678.
7. Insert text I like Tangwei in the 2nd line of the file
[[Email protected] ~]# sed ' 2i i like Tangwei ' Tobyedu.txt
I am Toby teacher!
I like Tangwei
I like badminton ball, billiard ball and Chinese chess!
Our site is tobyedu.com

My QQ num is 12345678.
8. Replace the Toby in the third row with the Xiaoting
[[Email protected] ~]# sed ' 3s#toby#xiaoting#g ' tobyedu.txt
I am Toby teacher!
I like badminton ball, billiard ball and Chinese chess!
Our site is xiaotingedu.com

My QQ num is 12345678.
9. Replace the Toby string of the first row to the third row with the Xiaoting
[[Email protected] ~]# sed ' 1,3s#toby#xiaoting#g ' tobyedu.txt
I am Xiaoting teacher!
I like badminton ball, billiard ball and Chinese chess!
Our site is xiaotingedu.com

My QQ num is 12345678.

Basic application of the SED of the Three Musketeers of Linux