grep sed awk

Want to learn the "three Musketeers" the most basic or regular expression of proficiencyThe complete collection of regular expressionsFormat of the Log2018/10/03 23:59:14.944 adapter.go:353: [warning] [SLOW_QUERY] cost_time:111.420169ms succ:true connection_id:0 txn_start_ts:403375431254540289 database: table_ids:[21] index_ids:[1] sql:select tab_id, is_ind, hist_id, distinct_count, version, null_count, tot_col_siz from mysql.stats_histograms where table_id = 40373...

Some nonsense:For regular expressions, always like to understand not understand, see some code, script regularly,awk,sed. The heart is always a bit empty. I can't remember the main. Usually not how to use, also did not summarize. Now have time, decided to summarize, by the way to overcome the see shell,js These with regular on the weakness of the guilty. I'm going to write three essays.Text :Generally speak

Using of grep sed awk on Linux, grepawk # This script is to parse data file: Fun0 () { ##[INFO1]A = 1 B = 2 c = 3[INFO2]A = 7 B = 8 c = 9[INFO3]A = x B = y c = z } #! /Bin/bashRead Info Abc# Echo $ InfoIf ["$ Info "! = "INFO1"-a "$ Info "! = "INFO2"-a "$ Info "! = "INFO3"]ThenEcho "Wrong INFO! "Exit 0FiSed '/^ # \ | ^ $/d' $1 |

" \{n,\} matches the previous line with the last character repeat number at least n times \{n\} matches the line with the previous character repeated n times example 1:[[email protected] tmp]# grep"^th"Regular_express.txt ThisDress doesn't fit me.example 2:[[email protected] tmp]# grep"y$"Regular_express.txt"Open Source" isa good mechanism to devo

Tag: enter lang \ \ Keep www www. How to enter blankAs follows: How to delete blank linesShen\nshen\\nsensehseheshesheTo really delete empty lines, you can use VIM: Delete empty lines through command mode. Vim in command mode (enter English characters in vim: Enter command mode) input: %s/^n//G. replaces all characters that begin with a carriage return, substituting null. If you have more than one contiguous blank line, you want to keep a row. Then simply enter the following li

#This script is to parse data file:Fun0 (){##[INFO1]A=1 b=2 c=3[INFO2]A=7 b=8 c=9[INFO3]A=x b=y C=z}#! /bin/bashRead Info ABC#echo $InfoIf ["$Info"! = "INFO1"-a "$Info"! = "INFO2"-a "$Info"! = "INFO3"]Thenecho "Wrong info!"Exit 0FiSed '/^#\|^$/d ' | Grep-a1 "$Info" | Tail-1 | Awk-f ' [=]+ '-v var= "$ABC" ' {if (var==$1) {print $}else if (var==$3) {print $4}else if (var==$5) {print $6}else {print "Wrong abc!

the beginning and end of a word Demo results650) this.width=650; "Src=" Http://s2.51cto.com/wyfs02/M00/85/A8/wKiom1erK9KTmXhgAAB0GJE0uWc768.png-wh_500x0-wm_3 -wmp_4-s_1012968505.png "title=" 3.png "alt=" Wkiom1erk9ktmxhgaab0gje0uwc768.png-wh_50 "/>Example:Use the following command to find the No and standard IP numbersGrep-e ' [1,2][0-9]{0,2}\. [0-9] {1,3}\. [0-9] {1,3}\. [0-9] {1,3} ' exeLooking for a standard mobile phone numberGrep-e ' 1[34578][0-9]{9} ' exeSearch for No and stand

Grepqueries/extracts rows that contain specific keywords from the data file.SedUsed primarily for substitution processing of specific strings in a data file.CutCuts the contents of the selected column (-F num) or the character (-c) by the specified delimiter (-D).AwkOften used to display only specific fields, or to rearrange the order of fields in a row.JoinA file used to combine fields with a common key value in a record.---------------------------------------------------------------I'm a split

Regular expressions: Regular expressions are a set of rules and methods that are defined for processing a large number of strings.Regular expressions are widely used in almost all languages (e.g. Java, C, C + +, PHP, Python, etc.)============ Basic Regular =============^ Match with what to start with, ^w matches content starting with W$ match with what ends, $w matches content ending with W^$ Matching Blank lines. Represents and can only represent any one character\ escape character, such as \.

Use the shell command in combination with grep awk sed sort # when processing a ticket, select the desired ticket first. Here, select the AAA ticket, then sort by corresponding fields # The-k parameter is generally used, and + 0.4 is generally used when the file name is relatively regular

Jul 03:21/root/oldboy.txt 1.5 write up the previous directory CD command 1) go to the previous level directory CD .. 2) View multiple top-level directory CDs: /.. /.. /.. /.. /.. /.. / 3) Enter the current directory CD Chapter 2nd the use of the Three Musketeers of Linux 2.1 grep (filter) Three Musketeers old three Method 1-grep [[emailprotected] data]# #grep