grep is a command-line tool for searching text patterns in files.

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0
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1answer
290 views

Invalidating email addresses from sql dump before import

Synopsis I would like to import production data into the development environment so testing can be done in an almost accurate way. Of course I need to invalidate e-mail addresses as I don't want e-...
3
votes
1answer
41 views

How to find file which have not specific content?

I have a lot of files which already have SPF records defined grep -i v=spf *.db /var/named/domain.com.db domain.com. 14400 IN TXT "v=spf1 +a +mx +ip4:XXX.XXX.XXX.XXX ?all" And want ...
2
votes
1answer
396 views

linebreaks between results in grep

I need to occasionally monitor a spider that I have running on my server. I'm testing it to see how many iterations of it are running concurrently and to see if any of them are hanging. I use this: ...
5
votes
0answers
210 views

grep is inconsistently defaulting to grep -P?

I have a script that does some housekeeping that works perfectly well when invoked from an interactive shell, but did nothing when invoked by cron. To troubleshoot this I started a shell with a 'blank'...
7
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5answers
513 views

Grep-ing gzipped files [duplicate]

I have a set of 100 log files, compressed using gzip. I need to find all lines matching a given expression. I'd use grep, but of course, that's a bit of a nightmare because I'll have to unzip all ...
0
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1answer
36 views

Is there a tool for indexing a directory in order to perform cheap content search? (hashing by word, for example)

I am often using grep -R on an entire directory tree to find all files that contains a specified word. I wonder if there is a tool that makes the whole operation much faster, maybe via hashing? (Unix ...
0
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1answer
67 views

indexing logs for fast repeated grep/search

I have sets of verbose logfiles that in the course of solving a problem, I will repeatedly regrep. I usually have about 1-10GB sets of 50-150 files, that I'll spend a few hours with and then never ...
2
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4answers
12k views

How to properly pipe find with grep and cp in this use case

I am interested in recursively grepping for a string in a directory for a pattern and then cp'ing the matching file to a destination directory. I thought I could do something like the following, but ...
1
vote
2answers
163 views

Deleting inserted content in multiple files on linux server

I often have problem with sites that get hacked. Usualy they end up with inserted script in different files. Is there a way, on linux, to search for this content and automaticaly delte it ? Usualy ...
1
vote
1answer
111 views

Centos locate file in binary file

I have ran a command to find a string in files on the server like this: cd / grep -r "string to be found" * And the server returned some results like this Binary file dev/disk/by-path/pci-0000:00:...
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votes
2answers
909 views

how to check null value in grep command using in shell script? [closed]

In shell script in centos, i write following 2 lines cmdread="Myprogram" kill -9 `ps ax | grep $cmdread ` But some times when manually myprogram stopped then my shell script give me warning that ...
2
votes
2answers
1k views

How to grep IP address and number of access

I am using the following command to get the number of hits of an IP address: grep "21/Jul/2013:22" /var/log/ispconfig/httpd/*/access.log | cut -d[ -f2 | cut -d] -f1 | awk -F: '{print $2":"$3}' | sort ...
0
votes
2answers
86 views

Looking for a shell command to read non-binary part of most common image types

A website I'm hosting on my dedicated server has been hacked. Some pictures have been infected with things like <?php eval(base64_decode(....));?>. I'm looking for a generic shell command which ...
0
votes
2answers
512 views

GREP find and use SED to replace string on all files

One of our old hosted Joomla sites suffered a JavaScript injection, and im going through cleaning it up. The following code was inserted into every .php or .js file: <? #0c0896# echo " <script ...
0
votes
1answer
327 views

Using grep -Po to extract regex

I've been struggling with "grep -Po" off and on for a couple hours. What I would like to do is to find out how many bytes the virtual disk size is as reported by qemu-img info. Here's example output:...
0
votes
2answers
458 views

Getting Running Script Names Via PS

I need to get a list of all running PHP scripts but piping PS thru grep just gives me a list of all references to PHP files How do I accomplish this? Is this even possible? root@myhost:/var/www/...
1
vote
2answers
487 views

Why does grepping ps [p]rocess_name exclude grep from the results

A cool trick that saves you from having to use grep -v when grepping ps output (yes I know pgrep exists) is to put the first letter of the process into a character class like ps -ef |grep [s]vn. This ...
2
votes
2answers
2k views

How to find files that don't contain a given search string

I have a command that finds all the PDF files that contain the string "Font" find /Users/me/PDFFiles/ -type f -name "*.pdf" -exec grep -H 'Font' '{}' ';' How can I change this command such that it ...
0
votes
1answer
176 views

Finding out total PHP usage in MB's

I'm trying to find out total memory used by all PHP processes on my CentOS server. After some grepping and awking this is my final command. ps -e | grep php | awk '{print $1}' | xargs pmap | grep ...
0
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2answers
115 views

Grep first number value from quota -u

I would like to get first number from: [root@nowosci /]# quota -u testclient Ograniczenia dyskowe user testclient (uid 7798): System plików bloki miękki twardy pobł. pliki miękki twardy pobł. ...
1
vote
2answers
70 views

I want to filter out two lines from the output of a program [closed]

I have a command that outputs a bunch of data, but I only want two lines. Grep doesn't work because the lines I want are not next to one another. I can't seem to figure out sed... Help please. :) ...
1
vote
2answers
276 views

The meaning of * in Basic regex versus Extended regex

I thought * meant zero or more of the character or class that precedes it in basic or extended regex. Why does echo hello| grep '*llo' fail but echo hello |egrep '*llo' succeed?
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2answers
839 views

Testing if a server is up with curl and grep. Grep adds headings?

Hi I'm trying to see if a server I'm running has been stopped (if it has, it returns a 502 Bad Gateway message.) So I tried to do this : curl http://MY_URL | grep "502" The curl part returns what ...
0
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2answers
605 views

How to TAIL & EGREP for a specified time range in a BASH script

The subject mostly says it all. I am in charge of a few web servers running Ubuntu 12.04 running Apache2 & I would like to setup APC. Now I understand APC can hit segmentation fault issues when ...
0
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2answers
74 views

grep double quote in cron

i run this command on the terminal $ my_json_generator.rb | grep \"mtype\":164 | my_json_consumer.rb json_generator creates json objects. 1 per line. {"foo":7, "mtype":164, "bar":[1,2,3]} I ...
0
votes
1answer
989 views

find and delete files of a certain type inside a tar.gz file

Is there a way to not only find but also delete any .gz files inside a .tar.gz file? I found this link but I wouldn't know how to modify it to make it able to delete found files.
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votes
2answers
2k views

How can I count the number of lines matching a pattern returned from a linux command

How can I count the number of lines matching a pattern returned from a linux command I want the number of lines returned beginning with 'foo' , so if I pipe the output to grep will this ...
0
votes
1answer
399 views

grep to IP address when IP address in parameter

I need to grep to IP address ( as the following example ) , I use ksh script , # ifconfig -a | /usr/xpg4/bin/grep "100\.106\.2\.120 " inet 100.106.2.120 netmask ffffff00 broadcast 100....
0
votes
1answer
281 views

Regex matching specific details if first match exists, multiline

I'm struggling to get the correct regex to match specifically 'Contact' and 'User-Agent' only if the 'Contact' address matches 10.0.x.x in ~70GB of SIP messages. The SIP message will always contain a ...
1
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4answers
691 views

greping multiple lines from MySql binlog

I have binlog from MySQL and I need to output certain time frame into a seperate file, how would I do that? here is sample of what binlog file contains: # at 460 #130120 0:09:17 server id 1 ...
0
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2answers
768 views

remove non-printing characters

I have a tab delimited text file. When I open the file with vi editor, I can see ^M character (in blue color). This is not part of my data. It got there because the original SQL data had carriage ...
0
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1answer
190 views

grep + match value only if value in the end of line

please advice what is wrong with my code, ( I run this code on both OS linux and solaris ) I don't get the line from: "file ended with .tmp" example: I need to verify if $FILE ended with .tmp ...
3
votes
2answers
5k views

Is there a way to find a specific word in all files/folders in Linux?

I usually use grep word * while being in a folder which includes files that have that word. But in this folder i also have folders which under them there are files that have that word, what is the ...
0
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3answers
349 views

grep + Regular Expressions to match uniq number

My target is to verify if $FILE is a backup file ( backup file ended with xxxx.xx.xx.xx number Example of backup files ls /etc/VRTSvcs/conf/config main.cf.17Dec2012.09.10.14 main.cf....
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3answers
75 views

grep only returns help text [closed]

Well, I am perplexed. I am working with an Ubuntu server and I type in grep 'bash' *.sh BUT fgrep 'bash' *.sh works like a champ. which grep and which fgrep both point to their respective ...
2
votes
1answer
192 views

finding files that match a precise size: a multiple of 4096 bytes [duplicate]

I have several drupal sites running on my local machine with WAMP installed (apache 2.2.17, php 5.3.4, and mysql 5.1.53). Whenever I try to visit the administrative page, the php process seems to die....
1
vote
1answer
621 views

recursive grep started at / hangs

I have used following grep search pattern on multiple platforms: grep -r -I -D skip 'string_to_match' / For example on FreeBSD 8.0, FreeBSD 6.4 and Debian 6.0(squeeze). Command does a recursive ...
3
votes
2answers
426 views

Extracting a line section of mysql backup using sed

I occasionally need to extract a single record from a mysqlbackup To do this, I first extract the single table I want from the backup... sed -n -e '/CREATE TABLE.*usertext/,/CREATE TABLE/p' ...
1
vote
1answer
37 views

start output from first match

i have a command that prints out some statistical information that looks like this: Detailed Hardware Status Dump: ... Summary: Memory info: OK HDD info: OK ... I'd like to ./dump_hw_status | ...
2
votes
3answers
138 views

grep pattern interpretted differently in 2 different systems with same grep version

We manufacture a linux appliance for data centers, and all are running fedora installed from the same kickstart process. There are different hardware versions, some with IDE hard drives and some SCSI,...
0
votes
1answer
321 views

Grep /var/log for hacker/script kiddy activity and e-mail?

CentOS 6 Apache Server version: Apache/2.2.15 (Unix) Thinking about how to automatically, once a day, grep all the logs in /var/log/httpd for hacker, phishing, etc activity and e-mail it to myself so ...
18
votes
1answer
469 views

Why bracket a single letter in a grep regex?

I've seen several instances where people are doing this: grep [f]oobar But I don't understand why that is preferable to grep foobar
0
votes
3answers
2k views

How can I grep for two values from the same input being piped to it?

CentOS 5.x I'm trying to build a shell script that searches data provided via stdin. Here's an example of the input stream: Date: 1/1/11 Time: 12:00 AM Foo: 12345 Foo1: dskjflsdkjflksdjlfds ...
8
votes
2answers
4k views

Grepping for CIDR ranges

From time to time I want to grep CIDR ranges out of my Apache log files. This is easy for ranges that fall on the natural boundaries (/8, /16 and /24) but not so easy for other ranges such as /17 and ...
0
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2answers
1k views

grep, count and sort iptables log to get IPs qty and DPT?

How can I grep count and sort iptables log to get IPs quantity and DPT? Like I used this oneliner to get top IP quantity. egrep -w "Invalid Packet" ipfirewall.log | grep -o '[0-9][0-9]*\.[0-9][0-9]*\...
3
votes
1answer
319 views

grep recursive exclusive search

I have text I want to recursively search in mydir/. I would normally type grep -r "text to find" mydir/" but what would I type if I wanted to search all the files except a specific one? For example, ...
6
votes
4answers
1k views

Kill process by command name

I would like to kill a java process based on the command name... Whats the best way to do it? (i.e. when you do ps -f the name in the CMD column).
1
vote
2answers
117 views

Delete All Files Matching Pattern In Directory

How can I delete all files containing -20 in the filename in the current directory? I have ls | grep "-20" | rm -rf But that does not work. Ideas? Thanks.
5
votes
4answers
7k views

iptables - Clear all PREROUTING rules with a specific destination address

I have a script that adds iptable PREROUTING rules. They all have the same to address. When I run this: iptables --list PREROUTING -t nat I see output like this: DNAT tcp -- anywhere ...
5
votes
2answers
3k views

Cron job checking for changes in Git repository

We have just moved our server configs to a Git repository. Therefore there should not be any changes in any of the repository folders. I was thinking about how I could set up a cron job to check for ...