grep is a command-line tool for searching text patterns in files.
1
vote
2answers
35 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 ...
1
vote
2answers
63 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
19 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 $1}' | xargs pmap | grep ...
2
votes
2answers
4k views
grep to find files that contain a string greater than x characters long?
Is it possible to locate files in a directory that have strings (with no spaces) longer than x length?
0
votes
2answers
236 views
tool to analyse/grep log files
Is there any web based GUIs to analyse or in realtime filter/grep log files from apache? log files that are access logs or error logs or postfix logs etc.
Edit: I don't mean traffic analysis. Much ...
0
votes
0answers
31 views
Very strange behavior with grep and IFS [migrated]
I'm having trouble using grep, the returned results are "n-empty", I mean without the 'n' character...
This is the script sample :
OLDIFS=$IFS
IFS="\\n"
i=$(grep -ril $1 *)
echo $i
IFS=$OLDIFS
...
0
votes
2answers
28 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.
...
6
votes
2answers
302 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
votes
1answer
60 views
Grep mail log for sender email and date
I am trying to grep the mail log in Plesk using Terminal on my Mac to find the issue with an email being sent from an external email to my client's email addresses. The issue started about two weeks ...
2
votes
3answers
358 views
How to grab a word from a file using sed or grep
I am trying to pull a piece of text from a file to use as input for the next command. The word always starts with "JID_" and then some random numbers/characters after that.
For example :
...
1
vote
2answers
33 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
57 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?
0
votes
2answers
26 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 ...
2
votes
5answers
525 views
remove 2 lines from output, grep match regular expression plus next 1
i have a log file from postgresql that has log entries of the format;
LOG: execute <unnamed>: /match this here/
DETAIL: parameters: /also want to filter this line/
I thought it might be ...
0
votes
2answers
119 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
votes
2answers
35 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
45 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.
-3
votes
2answers
55 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 ...
4
votes
6answers
1k views
How to remove a tagged block of text in a file?
How can I remove all instances of tagged blocks of text in a file with sed, grep, or another program?
If I have a file which contains:
random
text
// START TEXT
internal
text
// ...
0
votes
1answer
85 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 ...
0
votes
1answer
119 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 ...
1
vote
4answers
69 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
votes
3answers
102 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
...
0
votes
2answers
73 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 ...
3
votes
3answers
2k 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 ...
0
votes
1answer
64 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 ...
27
votes
5answers
2k 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 ...
3
votes
2answers
153 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 ...
-4
votes
3answers
56 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 ...
0
votes
2answers
210 views
Spamassassin one-liner to tag & move mail with an X-Spam-Flag: YES to a new directory?
Say you have a directory with tens of thousands of messages in it. And you want to separate the spam from the non-spam.
Specifically, you would like to:
Run spamassassin against the directory, ...
0
votes
2answers
246 views
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': []}
...
33
votes
11answers
28k views
Do you have any useful awk and grep scripts for parsing apache logs?
I can use log analyzers, but often I need to parse recent web logs to see what's happening at the moment.
I sometimes do things like to figure out top 10 ips that request a certain file
cat foo.log ...
0
votes
0answers
109 views
Different result with same grep conditions via ssh
Like in the subject I got different result from the same grep command.
The following command is run on a central server which query the other servers via ssh.
ssh root@$domain "grep `date +%Y/%m/%d` ...
2
votes
2answers
699 views
How can I remove malware code in multiple files with sed?
I've this malware code in so many .html and .php files on the server. I need to remove them using
sed -i expression
search all files under directory /home/
find infected files
remove the code by ...
2
votes
1answer
53 views
finding files that match a precise size: a multiple of 4096 bytes
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 ...
2
votes
4answers
672 views
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 ...
15
votes
7answers
23k views
how to find out mac addresses of all machines on network
Is there some easy way to find out mac address of all machines on my network rather than doing an SSH into each and ifconfig | grep HWaddr if there are 300 machines on network I really need some easy ...
1
vote
2answers
72 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.
1
vote
2answers
2k views
How to grep httpd error_log within a time range?
How can I grep only lines from a huge (120GB) httpd error_log based on a time range, say:
from 2011-11-15 11:30 pm
to 2011-11-16 01:30 am
Thanks!
-2
votes
1answer
38 views
I am trying to find the meaning of: diff filename 1 filename2 | grep '^[<>]' | sed “s/^> (.*)/\1 some string/;” [closed]
I am trying to find the meaning of: diff filename 1 filename2 | grep '^[<>]' | sed "s/^> (.*)/\1 some string/;"
Please break this down for my understanding. I know a few because, am using ...
1
vote
1answer
124 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
119 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
31 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 | ...
7
votes
5answers
3k views
How do i get the default gateway in LINUX given the destination?
Good day!
I'm trying to get the default gateway, using the destination 0.0.0.0
i used this command: netstat -rn | grep 0.0.0.0
and it returns this list:
Destination - Gateway - Genmask ...
2
votes
3answers
76 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 ...
19
votes
4answers
2k views
In tail -f, how do I filter out stuff that has certain keywords?
I want to tail -f my logs. However, I want to filter out everything that has the words:
"ELB", "Pingdom", "Health"
3
votes
2answers
360 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 ...
0
votes
1answer
179 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
415 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
3
votes
3answers
166 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?
