Questions tagged [grep]
grep is a command-line tool for searching text patterns in files.
327
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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 ...
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0
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2
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820
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 ...
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1
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4
answers
3k
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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:...
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2
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563
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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/...
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2
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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 ...
user160910
14
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2
answers
21k
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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 ...
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1
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477
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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 ...
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2
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292
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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.
...
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1
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2
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1k
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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. :)
...
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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?
user160910
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2
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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 ...
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2
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765
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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 ...
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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 only ...
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1
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1
answer
2k
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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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3
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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 ...
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652
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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....
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1
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424
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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 ...
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1
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4
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2k
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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 ...
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2
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1k
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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 ...
- 3,619
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1
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533
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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 ...
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3
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2
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8k
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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 ...
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794
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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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3
answers
101
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 ...
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1
answer
434
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....
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1
answer
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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 ...
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3
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2
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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' ...
- 561
1
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1
answer
51
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 | ...
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2
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3
answers
521
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
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1
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433
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 ...
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19
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1
answer
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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
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3
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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
...
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2
answers
13k
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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 ...
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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]*\...
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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, ...
- 1,630
6
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4
answers
4k
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).
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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.
- 5,438
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4
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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 ...
- 259
8
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2
answers
10k
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 ...
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puppet master --compile logs errors to stdout
I see a bug about this that was accepted and then closed a year ago: http://projects.puppetlabs.com/issues/3670 but I'm using puppet 2.7.14 and am getting the same issue.
I'm trying to use "puppet ...
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2
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294
views
Gathering IP's from a complicated log
I have a question regarding the use of some more advanced grep, awk, sed. I have a log file, for a proprietary MTA, that contains IP's in a string, delimited by [redacted]^~x.x.x.x^[redacted]. So far ...
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3
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views
Is there a way to grep with a constrained file type?
right now i am using something like this:
find . -name "*.xml" | xargs grep -l "foobar"
it works, but i was wondering if grep has this functionality built in?
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2
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908
views
Odd error with regular expression in grep
I'm running the following command:
cat something | egrep "(abc|def)$"
On a server running Linux.
The same OS with kernel 2.6.18 gives the correct answer, while with 2.6.19 I get:
Illegal variable ...
- 258
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1
answer
8k
views
How to grep string in perl [closed]
How to grep the string in perl.
Variable sessionWeb contains a web page html code. I want to grep "active Sessions" from this and want to print as below. For example the line in the web page will be
...
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2
votes
2
answers
4k
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Grep to find lines starting at pattern A until pattern B is matched
I have a log that contains bits like this:
[2012-04-16 15:16:43,827: DEBUG/PoolWorker-2] {'feed': {}, 'bozo': 1, 'bozo_exception': URLError(error(110, 'Connection timed out'),), 'entries': []}
[2012-...
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391
views
Find text, then insert linebreak and some php code across multiple files
I have a certain php code comment that appears in about 75 files across several users. This command succsessfully locates it. (I didn't bother looking for the double slashes because I wasn't sure ...
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3
votes
4
answers
5k
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bash : "set -e" and check if a user exists make script exit
I am writing a script to install a program with Bash. I want to exit on error so I added set -e to the beginning of my script.
I have to check if a user exists inside of my script. To do this I am ...
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2
answers
4k
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Grepping through the results of apachectl -S
I have a server with about 300 virtual hosts. When I want to make sure a specific httpd.conf file is loaded into the Virual Host config and the syntax is correct, I run apachectl -S. The problem is, ...
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1
answer
117
views
Regular expressions in GREP [closed]
I have an .xml file. The tags inside are:
<Info>Product</Info>
Now, I have 20 000 tags like this in the file. One tag however, starts properly but it is missing a proper closing tag. How ...
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63
votes
8
answers
24k
views
How to prevent "ps" reporting its own process?
$ ps | grep django
28006 ttys004 0:01.12 /usr/bin/python bin/django celeryd --beat
51393 ttys005 0:01.45 /usr/bin/python bin/django celeryd -l INFO
51472 ttys005 0:01.29 /usr/bin/python bin/...
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1
answer
8k
views
Ack search for literal strings [closed]
I am sick of having to escape things when I want to search for part of an html tag.
How can I ack search for exactly what I type without having to escape stuff?
e.g.
ack-grep 'console.log(foo'
I ...
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