grep a Unix command-line utility which searches input passed to it for lines matching a regular expression, and prints the results.

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What is a Linux command to find files containing some strings but not another?

I'm trying to search a lot of XML files for certain strings but not other strings, and I'm having trouble putting a command together to do it. I only want it to list the file names that match the ...
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97 views

Why does grep need a dot in a regex using '$'?

I though I knew grep, but maybe not. I want to find all lines in a file ending with ':' If I run grep :$ ~/greptester.txt but to my surprise, it gives no results. Sometimes I confuse '^' and '$...
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grep count multiple occurrences

Is it possible to do a grep count of multiple occurrences in a file in one single command? For example: $ cat > file blah alfa beta blah blah blahgamma gamma I can do: grep -c 'alfa' file 1 ...
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How can I retain grep's match highlighting when piping find into grep?

If I run grep foo bar.txt, grep highlights each occurrence of "foo" in bar.txt. But sometimes I want to use find to determine which files grep searches. So I do something like this: find . -iname "*....
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627 views

Search text in list of files

I'm trying to execute double search within files and return file names. I'm using find ./ -iname '*txt' | xargs grep "searchtext" -sl to find file names with 'searchtext' in them. Command is ...
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Pipe grep exit code away

When I need to suppress some kind of output e.g. foo | grep -v bar But foo gives sometimes only: bar bar bar... grep will return -1. How do I transform the exit code 1 to 0?
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Grep command, to remove lines containing a specified word

I want to use grep in the following way: grep -v "END","EXPDTA" 1bmz_model1.pdb > 1bmz_model.pdb I want the grep command to remove the lines which contain the words "END" and "EXPDTA", but all i ...
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How do I get grep color in the file names before each match?

If I run grep -ir "somethingtomatch" . from the current directory, I typically get results like this: ./some/path/file1.html: filecontent filecontent keyword filecontent ./some/path/file2.html: ...
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Can I create a “file” that, when opened, actually gives the output of a command?

I've found myself in a couple of situations now where I'd like to have such a "file" that essentially runs a script whenever it's "opened", allowing me to "read" it's output. For example, I might ...
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Recursive zgrep not working

I have a directory hierarchy that contains numerous .gz files. I want to be able to recursively grep them for the string "foo". From what I've read online the following should work: zgrep -R -H "...
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Does Unix grep work faster with long or short search terms?

Is it faster to look for long or short search terms? Or does it affect speed at all? In other words, should you make search terms as exact as possible? There are more than 100 000 files and each file ...
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How to use grep to match domain names?

I have a list of urls like: hxxp://url.com/subpage.html hxxp://www.url2.com/index.php hxxp://subdomain.url3.com/somepage.php ... How can I use grep to match the domain names only? All the urls ...
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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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How to have grep print only the matching text plus X surrounding characters

I need something similar to grep -A and grep -B but for characters. In other words, I have a file with incredibly long lines, e.g.: [thousands of characters] mytext [thousands of characters] If I ...
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Efficient way to search string within file find and grep

I am searching all files containing a specific string on a filer (on an old HP-UX workstation). I do not know where the files are located in the file system (there are many directories, with hudge ...
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410 views

linux: is tree -i -f -L $depth supposed to be faster than find -maxdepth $depth?

I am querying specific directories to see if I find files with a specific pattern in them and I have been trying it with two different commands: Standard find command: find -L $unix_dir\*/ -maxdepth ...
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234 views

Get additional data around match from grep

I'm wondering how to improve my grep use when being confronted with files with very long lines. Imagine something like "packed" JavaScript files that only have 1 line. Sometimes files like that spit ...
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Filter tail command through multiple grep commands to separate files

What I am trying to do is filter the output of one log file into separated log files based on a grep filter. tail -f test.log | tee >(grep "Error" > error.log) >(grep "Warning"" > warning.log) ...
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Using grep to find a string in files

How can I find a string in files in a directory, using file names beginning with the letter a. I also want to get the number of occurrences of this string from the grep I run. I tried this cat * | ...
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grep in Powershell

What is the mos easy/comfortable way to use Powershells built-in functions to emulate grep like behaviour? In scripts I use something like this dir "*.filter" | foreach-object{ $actfile = $_ ...
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grepping a substring from a grep result

Given a log file, I will usually do something like this: grep 'marker-1234' filter_log What is the difference in using '' or "" or nothing in the pattern? The above grep command will yield many ...
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Print line X lines before/after found line

I want to search for a particular string in a certain file. If I found the string, I also want to print the line X lines before (or after) that line. Can this with grep or awk, or do I need a ...
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Bash operator < , > , | and grep / kill

As an exercise, I wanted to kill a process by command line using basic bash principles but i'm having some errors that i don't understand: ps -A | grep nautilus | egrep -o '[0-9]{4,5}' | kill 1) It ...
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How to search a text file for strings between two tokens in Ubuntu terminal and save the output?

How can I search a text file for this pattern in Ubuntu terminal and save the output as a text file? I'm looking for everything between the string "abc" and the string "cde" in a long list of data. ...
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306 views

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 ...
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grep for file content but return the filename

I need the GREP syntax for the following task (am in a LINUX OS): querying ALL files in the CURRENT directory which contain STRING but only listing the FILENAMES which contain a match. Thanks!
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How to remove lines from large text file using bash

I got a huge text file (log file) in my CentOS which I would like to remove top part of, probably couple of thousand lines each day. (Or probably just split into two) I have search this site and ...
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grep -r not working on Solaris

How can I do recursive grep on Solaris? When I tried, I received this error: -r: invalid option.
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Regular expression and grep not working

I have the following regular expression: ([:digit:]{4})-([:digit:]{1,2})-([:digit:]{1,2}) It should get dates in this format: 2010-12-19 And I am using it on filenames that look like this: 2010-...
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187 views

Filtering and splitting huge file based on column Windows

I have about 2 TB worth of data files formatted like 12/20/2015 somerandomdata 12/20/2015 somerandomdata 12/20/2015 somerandomdata 12/20/2015 somerandomdata 12/21/2015 somerandomdata 12/21/2015 ...
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Regular Expression: how to match 'ab','ac' and 'a'

Now, I have three strings to be matched by a single re -- 'a', 'ab','ac' I suppose one correct re should be 'a[bc]?', but it seems not correct. What is the correct one? I try it in grep command. And ...
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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 ...
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Grep all files in a directory and print matches with filename

I have a list of log files that I create as part of a video encoding script that I wrote. I would like to search all of them and print out certain statistics from the encode - how fast they were ...
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grep not functioning correctly

I've been happily using grep for many years without any issues, but since today it quit working. During the past hour I tried this and that, but enough is enough, I'm posting the bastard here: On the ...
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How to grep a line with a backslash at the end of the line?

I'm trying to grep a line with a backslash at the end of the line like: abc\ def ghij ... I hope it can grep the line "abc\". I tried the command below but they didn't work. grep -EHn "\\$" ...
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regex : does not begin by “pattern”

I have a lot of lines in my LIST file and want to list only lines whose name does not start by (or contains) "git". So far I have : cat LIST | grep ^[^g] but I would like something like : #not ...
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1answer
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Is negative look-behind supported in OSX grep?

I'm trying to do something like this: grep -r '(?<!notthis)butthis' ./* And I'm getting no results when some should be returned. Am I missing an escape? Or does OSX just not support regex ...
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Grep default color option

grep is one of the most commonly used command in linux. It feels to me that its basic feature to highlight the string you searched for on the output lines. this can be achieved by --color option. ...
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Search for and print only matched pattern

I have some huge xml text files. I need to write a script to find and print a specific tag only. I tried sed and grep but they both return the whole line. Using SunOS 5.x, so not all linux commands ...
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grep does not recurse

Whenever I use grep with gnuwin32's recurse option -r and include a glob pattern for files to search (e.g. *.c), no files in the subdirectories are searched. I am using the latest grep from gnuwin32. ...
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349 views

grep recursively to look for occurrence of a word in a particular file

I know about grep -rin 'text' /path/to/direcotry But I dont want to look up in all the files . I just need to check for occurrence of 'text' in all files named wscript. How can that be done ?
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Bulk renaming files [duplicate]

Possible Duplicate: How can I mass rename files from the command line or using a 3rd party tool? So I have a series of files with the following format Their real file name followed by the date....
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2answers
930 views

Checking if any data exists on a presumably empty storage device

So, say you've completed a full pass of: dd if=/dev/zero of=/dev/sdX bs=1M Then, you'd like to make sure the destination has been really zeroed out (ignoring the confirmation messages from dd ...
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Grep on the whole server in Ubuntu

I need to use the grep facility on the whole server. I tried the following: grep -r 'MyString' / grep -r 'MyString' /* However, none of these seem to work. Any suggestions?
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Matching a number sequence in grep

So I'm trying to match a year number sequence with grep and this should be easy. I'm just a bit stumped that my simplistic regex isn't working. What I'm doing is running a tool which archives some ...
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unix command to verify span of word in text

What unix command(s) can I use to determine the line span that a word appears in text? The "span" being equal to the line number of the last instance of a word minus the line number of the first ...
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tar - exclude certain files

I wish to tar all files in a directory and its subdirectories that do NOT end in .jpg, .bmp, .gif, or png. So, given the following folders and files: foo/file.txt foo/file.gif foo/bar/file foo/bar/...
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how to find (grep) paragraph start with word and ending with other word and ignore new line?

I want to find a paragraph is a list of files. For example an SQL statement which looks like: upadte b_table set number = 100014 where id in ( select number_desc from t_table ...
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finding surrounding lines with grep

I know how to use grep to output a line that matches a string. But what if I also want to output one line above every line containing a matching string, how do I do that?
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How to get command output of “nvidia-settings” via command line?

the case at hand: nvidia-settings -q all | grep 'Attribute.*GPUCoreTemp' gives: Attribute 'GPUCoreTemp' (system5:0.0) 58. Attribute 'GPUCoreTemp' (system5:0[gpu:0]): ...