Questions tagged [grep]
grep is a Unix command-line utility that searches input for lines matching (or not) a regular expression and prints the results. Use this tag for questions about how to use grep features, how to write regular expressions that work with grep, and general usage. Because grep is now available in Unix-like environments (e.g., Cygwin on Windows), you can also use this tag for compatibility questions, and differences between versions and software environments.
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How do you search for strings in a file which in turn is in an archive?
I can search through a number of files for a particular string by pipelining 'grep' and 'find' commands.
Now, I have some 10 zip files each of which has archived a lot of text files. Is there any ...
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votes
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Grep: Count specific string in all recursive files with matchi filename
I already could manage to count strings in all files in directory:
grep -roh „XXX" . | wc –w
But I don't know how to isolate the statement. I only want to count the words in files which have the ...
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2
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How to restrict grep to search only below a token of a column?
How can I use grep to search only the values of a column below a token? For example in the following CSV file:
A B C
1 4 5
2 3 0
1 3 6
...how can I get only ...
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grep to display all IPs in a text file (linux)
I'm writing a script to look for a ping from a certian foreign IP, but I am having some trouble understanding how to format my "grep" command.. Inside my text file is the output from "netstat anp" ...
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Perform a GROUP BY-like command in UNIX
I am having a text file like the following:
1 2 3 4 5 6 7 8 9 ... n <-- column numbering
1 0 0 1 0 0 0 1 0 ... 0
0 1 0 0 0 0 0 0 0 ... 1
1 0 0 0 0 0 0 1 1 ... 0
0 1 1 1 0 1 0 0 0 ... 0
0 1 0 0 ...
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votes
3
answers
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Using find or grep to locate filenames with accented characters from a different encoding system (Windows to Linux)
I tried to tag late onto a question similar to mine on stackoverflow (Find Non-UTF8 Filenames on Linux File System) to elicit further replies, with no luck so far, so here goes again...
I have the ...
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Ping multiple domains from file and out only desired IP
Need bash script to ping multiple domains from file and output just domains with adress ip : 1.2.3.4
exemple (domains.txt):
www.google.com
support.mozilla.com
stackexchange.com
support.mozilla.com
...
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2
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grep: return NULL if false
I'm trying use grep to extract attributes from a large collection of XML files. I've tried usinggrep -E -m 1 -o -Z "<tag>(.*)</tag>" /home/somepath/*.xml || printf "NULL" but for some ...
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Better way to do "echo $x | sed ..." and "echo $x | grep ..."
I often find this in scripts (and, I have to admit, write it myself):
a=$(echo "$x" | sed "s/foo/bar/")
or
if echo "$x" | grep -q foo
then
...
fi
Consider "foo" to include some regex stuff.
I ...
- 4,490
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votes
2
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remove pattern with random numbers (digits) from php files
I am trying to remove or replace the digits ((random numbers)) in big numbers of php files using find & xargs and grep with sed etc .. the numbers looks like that
inside the php file
/web/...
- 47
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1
answer
515
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How would you count every occurrence of a term in all files in the current directory?
How would you count every occurrence of a term in all files in the current directory? - and subdirectories(?)
I've read that to do this you would use grep; what is the exact command?
Also, is it ...
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1
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How to find the last 2 characters of Chinese names with command lines tools?
I have a list of Chinese names, some of them have 2 characters, others may have more or less, like following:
I want to use some command lines tools, to find the last 2 characters of each. If doesn't ...
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1
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Save text from file between two given characters and save the output to file?
I have a file with the following kind of text:
@ heading with some text
the.actual.text.of.choice
which.can.be.several.lines
in.length.with.no.pattern
+
more.text.that.i.want.to
remove.several.lines....
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how to move files that contain string using find, xargs, grep, in linux
i have many php files maybe over Three million..
how can i use grep with xargs and find with mv to find contain the string in files and move them to directory if they match.
I try like that
find . -...
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1
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Converting from vim search to sed
I have a long Latex document with many sections. I'd like to check that all sections of the document are filled in. So I search for any time there is a '}' ending a section title, somewhitespace, and ...
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How do I search for a pattern using GREP that must occur AFTER the nth occurrence of another pattern on the same line?
I have a file with records that are pipe ('|') delimited. I need to search for a specific string on the 6th column only and then return the entire line through the grep utility. There are totally 10 ...
- 4,214
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3
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grep on Windows 7 Invalid Argument
I am using grep from Gnuwin32 on Windows.
Doing:
grep -r INSERT *.sql
Yields:
grep: *.sql: Invalid argument
Any idea why?
CommunityBot
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How to grep a whole word containg a dot (.)
My file contains the following text
xyz.com 123 321
xyz.com.br 123 123
abcd.xyz.com 123 321
I want to grep the line which contains xyz.com alone.
ie, the output should be the first line....
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1
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Why does grep -r --include=*.js * > dirname/.filename not write all .js files to a single file?
I am trying to put all js files in a directory and sub directorys into a single file in lexical order. What did I do wrong?
- 1,317
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Gnuwin32 grep: piping output on cmd.exe or Powershell
I' m trying to use the Gnuwin32 grep command to produce a list of files I would like to feed to another command (a Perl script really). I have a bunch of HTML files and I wish to list every one of ...
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any way to run grep backwards, i.e. from the end of the file and up?
I have a 70G+ log file, and i'd like the most recent entries (apache log append new items at the end) that match a pattern. i can either:
run grep | tail
or
run tail | grep
Option 1 will take ...
- 87.5k
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votes
2
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How do I grep multiple keywords from a file?
I want to use Unix's grep function to pull out multiple lines (with different keywords) from a file in one command line.
For example, I have something like:
doc-A1-151
file-A2-15646
table-A3-1654
...
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3
votes
2
answers
356
views
Performing PowerShell analog of *nix grep <multiple files by mask>
Is there a way to optimize PowerShell code below (it greps particular lines by string contained from a bunch of text files into a single one):
$ErrorActionPreference = "Continue"
Start-Transcript -...
- 221
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1
answer
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Searching across multiple documents for common words
I have the lyrics to a song. (.txt)
I also have lyrics to 50 other songs.
I'm looking for a way to analyse/search those 50 song lyrics with the lyrics to the first song, and find which one of the ...
- 629
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0
answers
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How to print absolute paths with git grep
I use the following grepcode command to recursively search a large number of git repositories. It prints the path of found files relative to the repository root, how can I print the absolute path of ...
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Extracting lines from a large text file which follows a pattern
How do i extract lines from a text file which satisfy this regex ^2.
I am using linux.
I know grep is able to extract the number of lines but i would need them to be output to a text file.
Is it ...
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2
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97
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How can I find a duplicate copy of an image file?
I have an image file, and I know there's another copy of it somewhere in a directory or one of its ancestors, but it has a different, unknown file name, and there are thousands of images in this ...
- 7,405
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vote
3
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Use grep to find files and pipe/open to open them
How can I pipe files from grep to open all matching files?
I've tried grep -li "type" * | open, but that does not work.
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Removing lines in text document that end the same
We have a script that downloads a list of domains for our squid box to block, but we keep getting warnings like the following:
2015/03/02 17:08:47| WARNING: You should probably remove '.artnau.com' ...
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1
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Awk eqivalent to grep -C <num>
I want to print 5 lines of context around each line that matches "foo" but not "foobar".
I can do the match easily enough via <output> | awk '/foo/ && !/foobar/' but I can't figure out ...
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2
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views
Linux : let process run per CPU
My server has 4 CPUs, and I'm parsing a file using grep. It's very slow using just one process.
Is it possible to let run four processes using these 4 CPUs? How to do it ?
Thanks.
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Grep matching lines but return matching key IDs in GnuPG output
Having this input:
rsa2048/C7927B82 2015-08-30
rsa2048/FB2D99F9 2015-08-30
I want grep to only return the key ID, for example: C7927B92. Using the pattern from Grep characters before and after match?...
CommunityBot
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2
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grep - mark this line, which contains even quantity selection
I would like to mark this line, in which there are even quantity selection. In this case I want to mark even number of digits too.
for example:
for input:
22 34 423 22
23213 34 345 23
Result should ...
- 453k
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1
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923
views
grep - mark the same digits in the line bash
I want to mark the same digits, which can repeat 3 times.
My command:
grep -E '[[:digit:]]{2,3}' file
mark every digits, but I want to one the same digit.
Input:
11111 222 33
...
1
vote
1
answer
540
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Can using a SSD speed up "grep"?
I need to use grep to parse a 50GB file, and it's very very slow on my server.
I wonder if it'll be faster if I replace my server disk with SSD? Is it worth the upgrade?
Thanks.
Edited:
This is ...
CommunityBot
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1
answer
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how to grep something with a wildcard path?
I want to grep a Gemfile in few rails apps. But for each rails app there are many branches and out of which the latest branch name lets say is 'main'.
The structure is something like this:
workspace ...
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3
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Error extracting data from a text file, with grep command in bash
I generate an output file named "silence.txt" with ffmpeg. When I try to extract lines containing the word "silencedetect", I've got a strange extract.
Here is my original "silence.txt" file :
...
CommunityBot
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How can I mark two columns in the middle of text
How can I mark two columns in the middle of text.
grep --color '^[[:alnum:]]*[[:blank:]]' file
This mark text in the beginning, but I want to mark second and third columns. How can pass first one?
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CygWin: grep command shows some "binary file coincidence" message
I have been googling about this, but, maybe due to my spanish version of CygWin/Windows, I have not been able to find a solution.
I have latest (December 2014) CygWin 32 bits installed, and it seems ...
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votes
1
answer
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bash change strings with multiple escape characters
Hello i try to automate for example change one variable in php file .
root /tmp # cat defaults.inc.php|egrep "reply_all_mode"
$config['reply_all_mode'] = 0;
I try to first catch this by grep ...
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1
vote
0
answers
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Grep exit status not returning expected value
In file "WAP" word is there. When I am running grep command grep -i "WAP" filename. I am getting exit status 0. That is fine.
But when I am searching for those words which they are not in file. I am ...
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votes
0
answers
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Search text in zipped files and move them to other folder
Friends, On my Mac, I have 100s of zip files in a directory named Test. Let's assume I have files a.zip,b.zip,c.zip....... Now I want to grep all files for a text "searchText" and move the matching ...
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How to insert lines into specific files in which a string is not present?
I'm looking for some help with a small script.
I would like to search all files corresponding to
/usr/local/directadmin/data/users/*/httpd.conf
for the string
centralized.log
If the string is not ...
CommunityBot
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1
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views
xrandr | grep " connected " give me more than one line but IFS=$'\n' read can't break it
I have something like this:
declare -a DISPLAYS
AUXILIAR="$(xrandr | grep " connected ")"
IFS=$'\n' read -ra DISPLAYS <<< "$AUXILIAR"
Why it isn't detecting line breaks if
echo "$AUXILIAR"...
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How to grep in Windows for for eval code?
I have written this code in Linux, How can I achieve the same in Windows server ?
find "dirname" -name "*.php" -exec grep -PHl "(eval\(.*\);)" {} \;
Basically I want to find out this pattern
...
- 1,510
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votes
1
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576
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When piped with ls, grep in solaris is not working
I am using the below command in solaris
ls -l | grep '*PROC*'
But it is not working. I have many files that contain "PROC" in their name like "XREF_PROC.complete" but when I use the above command ...
- 23.9k
0
votes
1
answer
835
views
List files that have both keywords with grep
I would like to list the files (using grep -r) that have both of the two keywords (not necessarily on the same line): word1, word2.
When I do the following, I get the files that have word1 or word2:
...
- 5,581
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3
answers
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How to use grep or awk to save every line from text file as new file?
I am a scripting beginner.
What i am trying to do.
I have a text file that looks like this (example):
hello
hi there
apple
I am trying to make a script that saves every line as a separate new file ...
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how do I grep only the user created profiles among all users in linux ?
From the below output , I just want celesial and neetish user
I can't figure how to do it though .
celestial@celestial:~$ sudo repquota /
*** Report for user quotas on device /dev/disk/by-uuid/...
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Error with command cut: the delimiter must be a single character
I am trying to run this command from console:
# HTTPDUSER=`ps aux | grep -E '[a]pache|[h]ttpd|[_]www|[w]ww-data|[n]ginx' | grep -v root | head -1 | cut -d\ -f1`
But got this error:
Try `cut --...
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