Linux sed command parameter usage detailed

Use script to work with text files.

Syntax: sed [-hnv][-e<script>][-f<script file >][text file]

Additional Note: SED can process and edit text files according to script instructions.

Parameters

-e<script> or--expression=<script> the input text file with the script specified in the option.

-f<script file > or--file=<script file > process the input text file with the script file specified in the option.

-h or--help display Help.

-N or--quiet or--silent displays only the results of the script.

-V or--version display version information.

Basic sed Edit command:
SED edit command
P Print Matching rows
= Show file line number
A to append the new text information after the line number is positioned
I inserts new text information after the line number is positioned
D Delete the Anchor line
C replaces positioned text with new text
s replaces the corresponding pattern with the replacement pattern
R reading text from another file
W write text to a file
Q The first pattern match is completed after launch or immediately launched
L Show control characters equivalent to octal a S C i code
{} A command group executed at the location line
N reads the next line of text from another file and attaches it to the next line
G Paste Mode 2 to/pattern n/
Y transfer character
N continues to the next input line; pattern matching statements that allow cross rows

Common Command Parameters

Sed ' 1,3d ' file//delete 1-3 lines

Sed '/[aa]bc/p ' file//print line that contains ABC or ABC

Sed '/abc/d '//delete line containing ABC

Sed '/abc/!d '//Do not delete line containing ABC

Sed ' 5, $d '/delete all from line fifth to last line

SED 1q//Show First row

Sed ' s/$/.../g '//The last side of each row added ...

Sed ' s/d. (SK)/1&/g '//Meet D*sk Word, add sk sed ' s/<[^>]*>//g '/remove HTML tags before word

Sed '/abc/a123 '//Add a row with a row value of 123 after the line containing ABC

Sed '/abc/i123 '//Unlike A is I is inserting the front of the current line

Sed '/abc/c123 '//The line containing ABC will be changed to 123

Sed '/abc/{n;s/123/abc/g} '//Exact match contains ABC's next line, replace 123 all to ABC

Sed '/abc/{s/a/a/} '//replacement of a with ABC with a

Sed-e '/abc/h '-e ' $g '//will copy the line containing ABC, added on the last line.

Sed-e '/abc/{h;d} '-e '/123/g '//will copy and delete rows that contain ABC, added after the line containing 123. G is equal to the current row, G is the new row after the qualifying row. Sed ' s/^//g '//Add a space before each line

Sed ' s/. (.) $/*1/'//replace the penultimate digit with *

Sed '/abc/!s/1/*/g '//in rows that do not contain ABC, replace all 1 with *

Sed ' s/1|2|3/*/g '//in GNU will replace either 1 or 2 or 3 to *

Sed-i '/root/s/no/yes/'/etc/ssh/sshd_config sed in this text a row of root, matching the root row, replace No to Yes.

Replace the row containing now with the timestamp and the number of 8080 variable requests

Sed-i "/now/cnow$time_stamp 8080 request= $web 1tomcat"/var/www/html/munin/web1-2.html

Inserts a row at the position of a line

If you just append a line to a document, it's easy. >> can be done. However, if you insert it in a specified row.

Sed-i "8 S/^/alias vi= ' vim '/"/ROOT/.BASHRC

is to insert the alias vi= ' vim ' on line 8th.

Insert text before the first line

Sed-i ' 1 I insert string ' filename

Insert on last line

Sed-i ' $ A insert string ' filename

Inserts before a matching row

Sed-i '/pattern/i insert string ' filename

Inserts after a matching row

Sed-i '/pattern/a insert string ' filename