sed and awk book

Sed and awk Background When designing a script, you may need to modify the script, such as deleting or replacing some keywords. This method of dynamically modifying files during script execution is called Stream editing. A tool with stream editing capabilities is called stream editor ). Sed is a leader in this field and can complement bash's shortcomings. In addi

strings/g '/sbin/ifconfig eth0 | grep ' inet addr ' |sed ' s/^.*addr://g ' | Sed ' s/bcast.*$//g '/sbin/ifconfig eth0 | grep ' inet addr ' |sed ' s/^.*addr://g 'nl/etc/passwd | Sed-e ' 3, $d '-e ' s/bash/blueshell/'awk: is a powerful text analysis tool. Typically

rm $filename F Idone(4) View native IP address#!/bin/bashifconfig | grep "inet Address:" | awk ' {print $} ' | Sed ' s/address: '//g(5) IP address legality judgment#!/bin/bashcheckipaddr () { #IP地址需由三个. Delimited and all digital echo $ | grep ^[0-9]\{1,3\}\.\ ([0-9]\{1,3\}\.\) \{2\}[0-9]\{ 1,3\}$ ">/dev/null if [$?-ne 0];then return 1 fi ipaddr=$1 a= ' echo $ipaddr |

Sed Structure Analysis Sed/awk provides many tutorials, most of which are examples of teaching materials, or grammar textbooks. After learning SED and awk, the results are learned, which is easy to confuse and the syntax is easy to confuse. This article mainly explains the s

all lines starting with 11$: Line Tail Locator:/11$/matches all lines ending with 11: Save the lookup string for reference in the replacement string: s/333333/**/g Symbol Representative Find string.X\{m\}: Continuous m xX\{m,\}: At least m xX\{m,n\}: At least m, but not more than n xAWK: is a programming language tool for working with text. The language of the awk utility is similar to the Shell programming language in many ways, although

protected] ~]# cg-c ' root ' 1.txt2[[email protected] ~]# cg-a 2-n ' root ' 1.txt1:root:x:0:0:root:/root:/bin/bashgrep sed is a matching rule that supports {1,3}, which means repeating the preceding characters 1 to 3 times. But awk belongs to a more complicated scripting language.Words, in it () and {} have special meanings, so we want to use these symbols, we need to give them out of righteousness, you ma

-----------------------------Overview----------------------------------- The Linux Text Processing tool (the following are commands and tools, and only as a display, not as a modification action) grep (filtering, but does not support regular expressions)Egrep (regular expression support)Sed (row filter)awk (column filtering) - the concept of regular expressions Regular Expressi

Basic use of Awk and SedYou can call sed and awk in the same way. The command line is as follows:Command [options] script filenameLike almost all unlx programs, sed and awk can get input from standard input and send output to standard output. If filename is specified, the in

grep, sed and awk are quite useful!Gerp Find, sed edit, awk analyzes and processes it based on content.awk (keyword: analysis processing)Parsing of one line of processing awk ' condition type 1{action 1} condition type 2{action 2} ' filename,

a/tmp/fstab.3;650) this.width=650; "title=" image "style=" border-top:0px;border-right:0px;background-image:none;border-bottom:0 px;padding-top:0px;padding-left:0px;border-left:0px;margin:0px;padding-right:0px; "border=" 0 "alt=" image "src=" Http://s3.51cto.com/wyfs02/M00/73/9D/wKiom1YCOMajYsnnAABloVsv4Wg148.jpg "height=" 123 "/>(4) Echo a file path to the SED command, take out its base name, and further, take out its path name;650) this.width=650;

] ruby] # sed-n '/ruby/p ' ab | Sed ' s/ruby//g ' #删除rubyInsert[[email protected] ruby] # sed-i ' $a bye ' ab #在文件ab中最后一行直接输入 "Bye"[email protected] ruby]# Cat ABHello!Ruby is me,welcome to my blog.EndByeDelete a matching rowSed-i '/Match string/d ' filename (note: If the match string is a variable, you need "" instead of ". Remember as if it were)Replace a strin

:/:/sbin/nologin[[email protected]/]# ifconfig | awk '/inet/{print "(#从ifconfig的输出中抽取含inet的行并打印第二域)[[email protected]/]# ifconfig | awk '/inet/{print $} ' | awk-f: ' {print $} ' (#在上面的基础上再抽取, this command allows you to get the IP address of the machine directly)Common command syntax for sedSED is a non-interactive text flow editor. It edits the text copy of the e

Common basic usage features of Find grep sed awk under LINUXJust to make yourself a higher standard, this is the beginning of a 6-month small white advanced road!Learning Linux Basic commands these days is a bit of a crime, especially for files looking for this piece. All I want to put some of the practical parameters I think commonly used to summarize, the big God do not spray ha ...Please advise, the litt

\+\)/[--\1--] [\2]/g ' list[--line--] [200]Line3 100Line4 100Line5 700Line5 800Line6 50Line7 350multiple sed combinations,[Email protected]:~# sed ' s/\ (\w\+\) 2\ (\w\+\)/[--\1--] [\2]/g ' list | sed ' s/line7/tttt/g '[--line--] [200]Line3 100Line4 100Line5 700Line5 800Line6 50TTTT 350AwkAwk is so powerful that I'm not listed here for space reasons, and I can se

Common basic usage features of Find grep sed awk under LINUXJust to make yourself a higher standard, this is the beginning of a 6-month small white advanced road!Learning Linux Basic commands these days is a bit of a crime, especially for files looking for this piece. All I want to put some of the practical parameters I think commonly used to summarize, the big God do not spray ha ...Please advise, the litt

word and replaces it with [], result: [This] [was] [an] [example]echo this was digit 7 in a number | Sed '/digit \ ([0-9]\)/\l/' #参数 \1 (number 1) converts digit 7 to 7---------------------------------------------------------------Text=helloecho Hello World | Sed "s/$text/hello/" #输出结果HELLO World---------------------------------------------------------------Text clutter and return to normal (replace space,

/rc5.d/: S70spice-vdagentd-------------------Instance:1. Statistics TCP Connection StatusCopy the code code as follows:# Netstat-na | awk '/^tcp/{++s[$NF]} END {for (a in S) print A, s[a]} '/^tcp/Filter out lines that start with TCP, "^" for regular expression usage, ... First, this is to filter out lines that start with TCP.S[]An array named S is defined, and in awk, array subscripts usually start at 1 ins

Title: SED/awk equivalent code to Unix Commands From: www.chinaunix.net thank you very much Equivalent code of SED and Unix commands: -------------------------------------------------------------------------------cat | sed ':'cat -s | sed '/./

to er, that is, lovablelover. The characters X {m}, X {M,}, and X {m, n} repeat: m times, at least m times, at least m times, not more than N timesO {5, 10} matches 5 ~ 10 o strings | OrEcho "Tom and Jerry" | sed-r's/(Tom) and (Jerry)/\ 2 and \ 1 /'Echo "Tom G1, G2, G3 Jerry" | cut-d ""-F2Echo "ABC Def" | sed-r's/([A-Z] +) ([A-Z] +)/\ 2 \ 1 /'Echo "ABC Def" | sed