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

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2
votes
3answers
84 views

word wrap in ssh session not working with grep

When I ssh to my Linux servers and use grep like this: grep 'timeout exceeded' logfile | less word wrap does not work. However, if I use the same command but use less first, like this: less ...
0
votes
2answers
42 views

Tail, grep and count the instances found in one command?

I am tailing a files output and grepping for lines with certain data. I don't want to output the data to the screen but instead count the number of instances it found and send that to the screen. The ...
-1
votes
1answer
36 views

How can I visualize a file removing every type of comment if a file (including /* */)? [closed]

I have this small script to visualize config files without the comment lines: cat $1 | grep -Ev '[:blank]*#|^[:blank]*$' | pygmentize -g but it still shows some comments in some files when they have ...
1
vote
1answer
68 views

is it possible to search only a files that have specific extended attributes set?

is it possible to search file in the linux OS that have particular extended attribute as this: ---S--l--- ---S--l--- 1 root root 0 Mar 1004:25/opt/csTuner/iba/wys/tuer_lolk What is S ...
-1
votes
1answer
23 views

How i can dump raw packets from an existing tcp socket using tcpdump on Mac and Linux? [closed]

Once I know the IP address and port number combo, I can run this to see some of the packets: tcpdump | grep [IPADDRESS] Anybody know how I can now see the raw packets too? Thanks!
4
votes
6answers
455 views

grep lines after match until the end

I have following output from git status, how do I grep for everything after Untracked files: [alexus@wcmisdlin02 Test]$ git status # On branch master # # Initial commit # # Changes to be committed: ...
2
votes
0answers
20 views

Extracting the date of the latest message from an mbox file

How would I go about extracting the "Date:" header for the latest received message in an mbox file? Note that it's not simply an issue of grep'ing for the latest occurrence of "^Date:", since it ...
0
votes
1answer
18 views

Grep a textfile with (find generated) files, but ignore paths

I receive a huge textfile generated with find. The contents of the generated textfile are a file-referenes with full path, i.e.: //server/dir1/dir1foobar.ext //server/dir1/dir2/dir1bar.ext ...
2
votes
2answers
46 views

Script to email if grep result is null

its been a long time and I cant seem to remember how to do this. I am trying to grep a logfile for a word or words and email if it does not exist in the last fifteen minutes ( I will be setting a cron ...
2
votes
1answer
40 views

how to get the desired value in bash shell from the lshw output?

I want to extract the info from lshw output where it says: -cpu product: ...... I want only the product info of this -cpu. How can I do that with awk or sed?
1
vote
3answers
30 views

How to grep (or other command?) for first instance to last instance in a log?

How does one grep/search a text file so that the results show the first line with the string, and then every other line until the last line with the string? So, if I have a file that looks like this: ...
1
vote
5answers
144 views

Get the pid if 2 tomcat(s) is running

I have 2 tomcat's running, how do I get the pid if both have similar names? ps -ef | grep java root 12952 1 0 10:01 pts/0 00:00:03 /usr/lib/jvm/jre/bin/java ...
2
votes
1answer
120 views

grep ouput filepath with file modified date?

Is it possible to make the grep command to output file paths with file modified date like so: 12-02-2015 /file/path/to/the/file 16-02-2015 /file/path/to/the/file 25-02-2015 /file/path/to/the/file ...
2
votes
2answers
122 views

How to grep directly to ftp?

What is wrong with this syntax? How to write output directly on remote ftp because lack of space on HDD? This command is working but there is no HDD space to get the full result: find /somedir/ ...
1
vote
1answer
49 views

Finding strings in files with relative path

I don't understand why this two commands don't provide the same result (the differrence is only relative vs. absolute path), can somebody explain it? annika /srv/www/pages/com.example.www/www/povruc ...
1
vote
1answer
229 views

How to grep a continuous stream, with paging

I posted this to Superuser but got no takers: http://superuser.com/questions/832578/how-to-grep-a-continuous-stream-with-paging I want to take a log file and filter out some irrelevant log entries, ...
12
votes
3answers
855 views

grep behaving differently on Fedora vs Ubuntu

So when I run this in Fedora I'm seeing this: $ ls hmm_data/indivA12_AATAAG/refs/par1/ 2R-orths.alleles 2R-ref.alleles $ ls hmm_data/indivA12_AATAAG/refs/par1/ | grep -F '-ref.alleles' ...
0
votes
2answers
64 views

Tail grep what tools are for it

I would like to run the following command: tail -f /var/log/syslog | grep -ri 00:16:CB:1E:AF:CA In Linux but it does not working. How would you interactively grep certain text from log files?
0
votes
0answers
75 views

Nginx - change status code based on grep of process list or similar

We are using nginx as a reverse proxy in our cloud infrastructure, and it's pretty handy. I'd like to use it for something else though. On some of our VMs, there is a process that I need to be able ...
1
vote
1answer
81 views

Regex matching first word and any word

I have a log file with a list of many entries. With grep regex I want to match the first word and another word which can be anywhere in the string. For example, if I specified "user1" the search ...
5
votes
1answer
328 views

screen causes “tail -F | grep” to echo unmatched lines

This is Ubuntu (3.13.0-29-generic #53), trying to do a simple bash script to monitor a log file for matching lines. If I do the following, there is no output in the bash shell except for matches, ...
3
votes
1answer
547 views

Need help grepping postfix log

I'm trying to search for an unknown string (Message ID) in a log based on a known string (recipient address), and then grep the unknown string to output the entire relevant log information. I'm able ...
0
votes
2answers
145 views

find and replace multiple files using a file as input to find and another to replace

I need to replace several chunks of text inside some php scripts... i have: find . -name 'products.php' -exec grep --silent 'TEXT_TO_FIND' {} \; -exec ls {} \; -exec sed -i ...
-1
votes
2answers
393 views

Parse Apache logs for specific verbiage within the last hour

I'm looking to parse my /var/log/httpd folder which contains a lot of Apache log files. I'm looking for specific events within the last hour. I've tried the below, but I didn't have any luck. grep ...
2
votes
4answers
64 views

Equivalent of grep -l for filenames in zipfile

Given a set of zip files, is there an easy way to list only those zipfiles that contain files whose names match a given pattern, cf. using grep -l to list only files whose contents contain lines ...
1
vote
1answer
67 views

Refine grep look behind to avoid numbers

When I query docker images, I get this: #> docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE local/debian 7.5 172c7702a46f ...
1
vote
2answers
46 views

How to report filenames found by strings after being piped through grep?

I've been around *nix long enough to remember having done this in the past, and now those neural pathways are gone... I'm searching /usr/local/lib for files that contain img_convert because I'm ...
-3
votes
1answer
154 views

Plesk Unable to exec utility listmng: Cannot find grep program System error 2: No such file or directory [closed]

I have a little problem with my plesk installation at the moment and unfortunately do not have enough knowledge to solve it on my own. I would therefore be glad if I could get a hint on this. I tried ...
0
votes
2answers
274 views

Bash/grep: ignore lines over N characters

I have a find/grep command that i use to search my projects' codebase, thus: find folder1 folder2 folderetc -print | awk '{print "\""$0"\""}' | xargs grep -n "search-string" Something that ...
1
vote
3answers
1k views

Capture piped multiline grep output into a variable

I'm using Zabbix's zabbix_sender.sh script to push exception stack traces to my remote Zabbix monitoring server. zabbix_sender.sh requires a key and a value for any data that it sends. It can read ...
1
vote
1answer
461 views

Get some meaning from apache logs with awk and grep [duplicate]

I am trying to have some meaning from my apache log files: I want to parse my access log and have some statistics about 200 status code hits (how many times each of them was hit). So I tried to learn ...
0
votes
1answer
65 views

How to comma-demilit the output from cut?

So far, I have this: grep -B 36 'pattern1' Mapper.1.Configuration.MapRules | grep "pattern2" | cut -d'"' -f2 which give me a new-line delimited list of values that I need. I could put this into a ...
2
votes
2answers
676 views

Sieve: filter subject with regex, file into mailbox named match

I am trying to filter mails by subject with a regular expression. The subjects I want to match are read like [git-foo] some more text where foo is the string I want to check for. I end up with the ...
0
votes
1answer
101 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 ...
3
votes
1answer
37 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
189 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: ...
4
votes
0answers
133 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 ...
7
votes
5answers
469 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
votes
1answer
35 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
votes
1answer
58 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 ...
1
vote
4answers
6k 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
161 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
91 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 ...
-1
votes
2answers
586 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
734 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
78 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
470 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
224 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 ...
0
votes
2answers
349 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? ...
1
vote
2answers
440 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 ...