Linux Three Musketeers--sed command brief

Linux Three Musketeers--sed
13.1 sed Introduction

2. Stream Editor (sed--)
4. SED features vs. version: processing text files, logs, configuration files
   Add, delete, modify, query
   Sed--version
6. Syntax format: sed [options] [sed directive] [input file]
   Sed-i.bak ' S#boy#girl#g ' oldboy.txt
   Parameters of the-i sed command
   s sed command
   g Small tail/decoration
8. sed command execution process
   13.2 SED Command Function example
10. equals ' = ' displays line numbers sed = person.txt
12. Single row-Enter line number to Sed-n ' 3p ' person.txt

    103,alex,coo

14. Displays multiple lines sed-n ' 3,6p ' person.txt
16. Line Sed-n '/oldboy/p ' person.txt containing Oldboy

    101,oldboy,ceo

18. Show lines containing Oldboy to display yy sed-n '/oldboy/,/yy/p ' person.txt

    101,oldboy,ceo
    102,zhangyao,cto
    103,alex,coo
    104,yy,cfo

20. Show lines containing Oldboy or yy sed-nr '/oldboy|yy/p ' person.txt
22. Show discontinuous lines Sed-nr ' 1p;3p;4p ' person.txt
24. Add two lines to the last line of the file sed ' $a 106,wuxingge,ufo\n107,lee,xo ' person.txt

    #a ==append Append
    #i ==insert Insertion

    Echo-e ' 106,wuxingge,ufo\n107,lee,xo ' >>person.txtcat >>person.txt <<eof

    106,wuxingge,ufo
    107,lee,xo
    Eof

26. Do not show blank line Method! means take anti sed '/^$/d ' person.txtsed-n '/^$/!p ' Person.txtawk '!/^$/' person.txtgrep-v ' ^$ ' person.txt
28. ' s### ' means that the first object that meets the criteria is replaced by line one sed ' s#1#dou# ' person.txt

    Dou01,oldboy,ceo
    -I means OK to modify
    -i.bak means to back up and modify first
    Double quotes inside the SED variable can be executed

30. The & symbol in the SED command represents the contents of the previous regular match to the Echo ' 123456 ' |sed ' s#.*#<&> #g '

    <123456>

    Echo ' 123456 ' |sed-r ' s# ([0-9]) #<\1> #g '

    <1><2><3><4><5><6>

    Echo ' 123456 ' |sed ' s#.#<&> #g '

    <1><2><3><4><5><6>
    13.3 Batch modification of file names
    Method 1-Replace with SED

    LS . Jpg|sed-r ' s# (.) JPG#MV & \1avi#g '

    MV Oldboy01.jpg Oldboy01.avi
    MV Oldboy02.jpg Oldboy02.avi

    LS . Jpg|sed-r ' s# (.) JPG#MV & \1avi#g ' |bash

    Method 2-Use the Rename method to bulk modify file names

    Rename jpg avi old*.jpg

    Rename from to File
    Replace what replaces the content with what files
    13.4 Common pits using SED commands

32. -R and-I use simultaneously:
    -R parameter in front:-ri normal result
    The-i parameter is in front:-ir indicates that the file is backed up XXR before replacing the contents of the file
34. -R and-n are used simultaneously: the contents of the source file are emptied to show only eligible content
    

Linux Three Musketeers--sed command brief