linux grep recursive

Starting from a Linux grep command, linuxgrep During Development today, I saw my colleagues using such a linux Command. grep 'class YourClass' -rwi * |grep -v svn Think of the grep command, several parameters. 　　 -R explicitly re

Linux Command Learning 1 (awk, grep), awkgrep 1. Write AWK internal code (for better understanding) BEGIN{size=0}{ if($5>4096){ size=size+$5; printf("%-10i%s\n",$5,$9)}}END{print "size is",size/1024/1024} 2. Remove the carriage return and add other parts. ls -l|awk 'BEGIN{size=0}{if($5>4096){size=size+$5;printf("%-10i%s\n",$5,$9)}}END{print "size is",size/1024/1024}' Objective: To view the files la

Linux Text processing the Three Musketeers grep egrepGrep:global search REgular expression andprint out of the line.function: Text Search tool, according to user-specified "mode (pattern) "Go through the line to search for the target text and print the matching lines."pattern: An metacharacters character written by a regular expression and a literal character, where the regular expression is a basic regular

Command format:grep [options] Find condition directory file Command function:For filtering, searching for specific characters Common options:-A (number) displays the (number) row after the line, in addition to the line that matches the criteria- B (number) displays the line before the line, in addition to the line that matches the criteria- C (number) displays the front and back (number) lines of the row, in addition to the line that matches the criteria -I ignore case when searching- v show

The search commands under Linux are mainly found and grep, and the two are different: The Find command is based on the properties of the file , such as file name, file size, owner, owning group, whether it is empty, access time, modification time, etc.grep is a lookup based on the contents of the file, and each line of the file is matched in a given pattern (patter).1.find Command Basic format:Find path -na

the matching lines.Examples of Use:[[Email protected] updatedb]# PS Aux|grep./update_stockRoot 14232 0.0 0.0 5928 724 pts/1 s+ 18:16 0:00 grep./update_stockRoot 25021 0.0 0.0 3056 816? S Apr12 0:03./update_stockPS aux output format:USER PID%cpu%MEM VSZ RSS TTY STAT START time COMMANDFormat Description:User: Owner of the itineraryPid:pid%CPU: CPU Usage consumed%MEM: Usage of memory consumedVSZ: Virtual Memo

Reprint: http://blog.sina.com.cn/s/blog_62e7fe670101dg9d.html Linux find a method that matches multiple keywords in GREP at a time by finding multiple specified files or excluding certain types of files(1) Linux find more than one specified file at a time:Find a.html and b.html Find. -name "a.html"-name "b.html" Find. -regex '. *\.txt\|. *\.doc\|

) this.width=650; "Src=" Https://s1.51cto.com/oss/201711/21/c0baa57b1add59de3a4524e8028709dc.png-wh_500x0-wm_3 -wmp_4-s_2882499046.png "title=" Grep27.png "alt=" C0baa57b1add59de3a4524e8028709dc.png-wh_ "/> \{,n\} matches the preceding character up to n times |0-5 0-5 .... Multiple matches650) this.width=650; "Src=" Https://s4.51cto.com/oss/201711/21/916caa8a24f322fa36ee64ba16b91a2d.png-wh_500x0-wm_3 -wmp_4-s_680372718.png "title=" Grep28.png "alt=" 916caa8a24f322fa36ee64ba16b91a2d.png-wh_ "/>\{

matching string to the output (the row number of the first line of the file is 1) -V: only display rows that do not contain matching strings. -F filename: Gets the search mode from the specified file. each row contains one search mode item. Example: [roo @ locallost user1] # grep printf *. c Find the printf string in all C files in the current directory Example: [roo @ locallost user1] # grep user1/ect/pas

expression regexpMetacharacters.: Matches any single character[]: matches a single character within a specified range[^]: matches any single character outside the specified rangeNumber of matches:*: matches the preceding character any time. *: Matches any character\? Match the preceding character 1 or 0 times+: Match the preceding character at least 1 times{M,n}: match the preceding character[Email protected] ~]# Cat/tmp/t.txtIt is open no opening###########Location Anchorage^: Anchoring the be

forcibly close the process that occupies the port:# Netstat-tlnpa | grep 44444tcp6 0 0 10.58.242.18:44444 :::* LISTEN 25049/javaThe port query result is like the above format, then we can write the following script according to this format:pinfo= ' Netstat-tlnpa | grep 44444 ' pid= ' awk ' {split ("' $pinfo '", Array, "/");p rint array[2]} "if [!-Z" $PID "]; Then

matching text.-V: Displays all lines that do not contain matching text.　　　　Pattern Regular Expression Main parameters:\: Ignores the original meaning of special characters in regular expressions.^: matches the start line of the regular expression.$: Matches the end line of the regular expression.\\>: End of line to match regular expression.[]: A single character, such as [a], a meets the requirements.[-]: range, such as [A-z], i.e. A, B, C to Z all meet the requirements..: all the individual ch

http://www.vaikan.com/use-multiple-cpu-cores-with-your-linux-commands/Have you ever had to calculate a very large data (hundreds of GB) requirement? Or search inside, or anything else--something that can't be done in parallel. Data experts, I'm talking to you. You may have a 4-core or more core CPU, but our appropriate tools, such as grep, bzip2, WC, awk, sed , and so on, are single-threaded, Only one CPU c

GrepThe grep command in a Linux system is a powerful text search tool that uses regular expressions to search for text and match lines to print.Command syntax:Usage:grep [-ABCDEFGHHIIJLLMNOOQRSSUVVWXZ] [-A num] [-b num] [-c[num][-E Pattern] [-F file] [--binary-files=value] [--color=when][--context[=num]] [--directories=action] [--label] [--line-buffered][--null] [Pattern] [File ...]Command instance:-C: Calc

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

-tomcat-6.0.16- Djava.io.tmpdir=/usr/local/apache-tomcat-6.0.16/temp org.apache.catalina.startup.Bootstrap StartRoot 27120 27015 0 13:23 pts/4 00:00:00 grep javaView all the Java-related processes with the following command:Get as on-line.When the associated process is received, a thread is terminated with theKill-9XXXXX for the above-listed serial numbers such as: 19979 thread termination: kill-9 19979Enter the following command to view the process a

Search for keywords from filesGrep 'linux 'text.txt // search for keywords containing Linux [Root @ localhost ~] # Grep 'root'/etc/groupRoot: X: 0: RootBin: X: 1: Root, bin, daemon Search for keywords from multiple files [Root @ localhost ~] # Grep 'root'/etc/group/etc/My. CNF/Etc/group: Root: X: 0: Root/Etc/My. CNF

] updatedb]# PS aux|grep./update_stockroot 14232 0.0 0.0 5928 724 pts/1 s+ 18:16 0:00 gr Ep./update_stockroot 25021 0.0 0.0 3056 816? S Apr12 0:03./update_stockps aux output format: User PID%cpu%MEM VSZ RSS TTY STAT START Time command Format Description: User: Trip owner Pi D:PID%CPU: CPU usage%mem: Consumed memory usage vsz: Virtual memory size consumed RSS: Memory size used by TTY: the secondary device number of the terminal (minor device numbers of

a , function : the grep command in a Linux system is a powerful text search tool that uses regular expressions to search for text and print matching lines . Second, usage:grep [Options] ... PATTERN [FILE] ...Find the PATTERN in each file or standard input. The default PATTERN is a basic regular expression (abbreviated to BRE).For example:Grep-i ' Hello World ' menu.h main.cThree, the main parameters: -G,

Background: Linux Under the hardware there are a lot of how to see the NIC is what kind of, the sound card is what kind of a few USB port and brand. [Root@emulmachine htdocs]# lspci |grep usb 00:03.0 usb controller:broadcom BCM5785 [HT1000] USB (rev. 00:03.1) USB controller:broadcom BCM5785 [HT1000] USB (rev) 00:03.2 USB controller:broadcom BCM5785 [HT1000] USB (rev 01) The command action: LSPCI the outpu