egrep command examples

more spaces followed by the grep line,. * Together, representing any character.650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M02/57/95/wKiom1SelReQNIv_AAClEf8sRJs235.jpg "title=" 3.png " alt= "Wkiom1selreqniv_aaclef8srjs235.jpg"/>[] matches a specified range of characters such as: ' [gg]rep ' matches grep and grep.650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M01/57/92/wKioL1Sel3iTSRT8AAA-1qieyZE214.jpg "title=" 4.png " alt= "Wkiol1sel3itsrt8aaa-1qieyze214.jpg"/>[^] matches a

Learn to build Nginx environment, you must configure the nginx.conf file, as follows:#user nobody;Worker_processes 1;#error_log Logs/error.log;#error_log Logs/error.log Notice;#error_log Logs/error.log Info;#pid Logs/nginx.pid;Events {Worker_connections 1024;}HTTP {Include Mime.types;Default_type Application/octet-stream;#log_format Main ' $remote _addr-$remote _user [$time _local] "$request" '# ' $status $body _bytes_sent ' $http _referer '# ' "$http _user_agent" "$http _x_forwarded_for" ';#acc

The Grep,egrep command in a Linux system is a powerful text-search tool that uses regular expressions to search for text and print matching lines. The grep full name is global Regular expression Print, which represents the globally regular expression version, and its use rights are for all users.1.grep: The oldest text-matching program that uses the POSIX-defined basic regular expression (BRE) to match text

Linux Command Text Search tool grep, Egrep, Fgrepgrep, the global search regular Expression_r (RE) and print out, is a powerful text search tool that uses regular expressions to search for text and print matching lines.The grep family includes grep, Egrep, and Fgrep:egrep are the extensions of grep; Fgrep finds one or more rows in a file that matches the given st

Extending regular ExpressionsExtended Regular Expression command: EgrepRegular expressions are not supported but fast: fgrepCharacter Matching:.:[]:[^]:Number of matches:*:?:+: Match the characters in front of it at least once{m}: Exact match{M,n} no backslash required:Location anchoring:^:$:\\> or \b:Group:(): Group\1,\2,\3,......Or|: or (A|B)Cases:C|cat=c or Cat(c|c) At=cat or catLazy Qualifier*? Repeat any number of times, but repeat as little as p

/wKioL1RyBW6gyoowAAENihiIgQE185.jpg "alt=" Wkiol1rybw6gyoowaaenihiigqe185.jpg "/>5. Find one or two digits in the/etc/passwd file;650) this.width=650; "title=" QQ picture 20141123222739.png "style=" Float:none; "src=" http://s3.51cto.com/wyfs02/M01/53/D7 /wkiom1rybplhrb48aamxu-qfgas665.jpg "alt=" Wkiom1rybplhrb48aamxu-qfgas665.jpg "/>6, displays the line that starts with at least one whitespace character in/boot/grub/grub.conf;650) this.width=650; "Width=" 857 "height=" 131 "title=" QQ picture 2

1.1, the basic definition: www.2cto.comgrep (Global search regular RE) and print out of the line, full search of regular expressions and print out the lines, is a powerful text search tool that can only use basic regular expressions to search for text and print matching lines.grep is a common and commonly used command, and its main function is to compare string data and then print out strings that match the user's needs, but the idea is that when grep

The Egrep execution effect is similar to "GREP-E", and the syntax and parameters used refer to the grep instruction, which differs from grep in the way it interprets the string. Egrep is interpreted using the extended regular expression syntax, while grep interprets it in basic regular expression syntax, extended regular than basic The expression of regular expression is more normative. Grammar

Linux basic command grep egrep fgrep usage and regular expression 1. grep, egrep, and fgrep commands this article mainly introduces the basic parameters and usage formats of grep egrep fgrep commands and regular expressions in linux, method. (Note: fg stands for an example in this article.) 1.1. basic definition: www.2

contain numbers:grep ' [0-9] '/etc/inittabFilter out all rows that do not contain numbers:Grep-v ' [0-9] '/etc/inittabRemove all lines that begin with ' # ':Grep-v ' ^# '/etc/inittabRemove all empty lines and lines that begin with ' # ':Grep-v ' ^# '/etc/crontab |grep-v ' ^$ 'How to print a line that does not start with the English lettergrep ' ^[^a-za-z] ' test.txtgrep ' [^a-za-z] ' test.txtFilter any character with repeating characters:grep ' R..O '/etc/passwd. Represents any one charactergre

the extension.[FILE ...] Text content Description:/home/love.txt How to find the path to textecho ' abc ' | grep--color=auto ' ABC ' transmits text content in a "pipe" way. Pipeline do not understand please niang pipe article.~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Egrep with grep, you do not need to add the "-e" option when using the extended regular.Big rookie wish: a higher level. Welcome to the B

Egrep Feature Description: The Egrep command is the same as the grep command with the-e flag, except that the error message and the use message are different and the S-flag function is different. To search for one or more files using the Egrep

Personal Insights: I think the text processing commands in Linux the grep egrep fgrep command is just as easy as mastering grep because the other two are almost the same, and the difference is very good.grep Basic Use method:Using the method grep [option] ' expression ' #学习的时候没好好听 don't know that I wrote it wrong, not for this post. Usually I don't read the video I studied before.The common options here are

Linux disk management commands and usage examples, linux disk command examplesLinux disk management Linux disk management is directly related to the performance of the entire system. Linux disk management commonly uses three commands: df, du, and fdisk. Df: list the total disk usage of the file system du: Check disk space usage fdisk: used for disk partitioning Df Df Co