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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Check which string occurs first in a growing file

I'm running a remote executable which produces a logfile. I want to write a script to check whether the executable is run successfully or encounters an error. The way I can do this is by looking at ...
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1answer
48 views

Piping lines to repeat commands

If my grep operation returns a list of IDs like in the following, can I somehow feed/pipe each line to a commandline command's parameter?: 12345 84758 49549 .. Like for example with the above ...
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284 views

osx bash grep - finding search terms in a large file with one single line

Is there simple unix command line i can enter which lets me isolate say 512 bytes either side of a search term, even if there is only one "line" in a very large text file? Ok, this should be easy. ...
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4k views

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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64 views

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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1answer
191 views

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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1answer
112 views

How to grep values under columns

How can I grep for a specific column name and display the value underneath that column. Sample data: StandByFile StandByPg StandByLSN StandByRcvBufUsed S0082160.LOG 621668 ...
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2answers
104 views

How to List Files greater than particular timestamp?

I have a directory in linux which has a list of log files where log files get auto generated if some job runs. Each log file gets appended with the timestamp like "JobName_TimeStamp" UPDATED: ...
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1answer
71 views

awk used with grep - no output

I have a bashscript which uses grep with awk as following: #ec2-describe-instances | grep -i instance | awk '{print "Creating -> " $3; system("ec2-create-image " $2 " --name " $3 "-$(date +%F) ...
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How can I “grep” recursively filtering the name of the files I want with wildcards?

When I want to perform a recursive grep search in the current directory, I usually do: grep -ir "string" . But that command searches inside all kinds of files, including binary files (pictures, ...
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275 views

Compare MAC address of live network interface using grep to existing configuration files

Cloning VMs creates new network interface everytime on CentOS/RedHat VMs. I need to rename the ifcfg-eth* to the same name as the live interface on the VM. What I would like to do is to use a script ...
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44 views

How do I print multiple sections in a text file?

I have a text file looking something like this: *FILESTART line_a line_b line_c *INCLUDE file_A.key file_B.key *INCLUDE file_1.key file_2.key file_3.key *SOMETHING_ELSE line_x line_y line_z *END I ...
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47 views

how do I grep within vim using some default parameters?

I often run a command such as this from within vim: :grep -r --exclude-dir=./.git --include=\*.cpp --include=\*.hpp . But I would like to not have to write this everytime I want to grep within vim, ...
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72 views

Multiple exclusion patterns with grep

I would like to select lines which do not match the specified pattern, where I have multiple patterns to exclude. As an example, I want to exclude lines which start with the keywords apple and banana: ...
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1answer
49 views

How do I quickly search through large ascii files with less?

I'm looking through some large log files (1-10 GB) and have been running into trouble using the standard less search functions (/). Searching for strings takes several minutes to find a match. I ...
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2answers
2k views

If, else based on command piped to grep

I can't figure out how to make this (what supposed to be simple) script to work. Basically what I want, to run different stuff based on the state of my Parallels vm, something like this: if [ prlctl ...
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3answers
86 views

egrep for time in H:MM:SS format

Working on the file an need to grep the line with a time stamp in the H:MM:SS format. I tried the following egrep '[0-9]\:[0-9]\:[0-9]'. Didn't work for me. What am i doing wrong in regex?
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1answer
217 views

GREP for multiple strings with wildcard

I am trying to copy lines from a log file from certain days. Here's an example of what they look like. 2014-05-01T15:53:16+00:00 DEBUG (7): 2014-04-301T11:08:10+00:00 DEBUG (7): This GREP ...
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1answer
1k views

Why ssh connection is refused?

How can I set up ssh connection success for all times? I do remote communication to my Raspberry Pi using ssh. Most of the time I can connect. But sometimes, I got connection error as "session is ...
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1answer
67 views

What does ps axuwfw return?

I am getting strange output including my old makefile output and process tree when running below command on linux ps axuwfw Also, what is the usefulness of the following command and how does it ...
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1answer
85 views

Spotlight search with context?

I'd like to perform searches so that: 1) It can search in the text in a large number of pdf files. Specifically, I want to search within a directory with nested directories several layer deep, and ...
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195 views

Print or grep lines which start from second column

I want to print lines which start from second column (first column is white space). $ cat test.txt first second third four second five seven Output should be: second second ...
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1answer
102 views

How does grep deal with overlapping lines?

Suppose my text file looks like this: hello world1 foo bar2 hello world3 foo bar4 hello world5 foo bar If I run this command grep -A 4 'hello' draft.txt, I thought it print something like this: ...
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2answers
101 views

Trying to count and print song file names using awk

RANK NAME BAND YEAR GENERE DOMESTIC/INTERNATIONAL 206:Reach Out, I'll Be There:The Four Tops:1978:Pop:3/2 207:Bye Bye Love:The Everly Brothers:1950:Classic:3/2 ...
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1answer
35 views

grep and search and replace in linux accepting parameters with /

I'm trying to find and replace the contents of a file using grep and sed. grep "#!/bin/bash" ./ | sed xargs -i 's/#!/bin/bash/#!/usr/bin/env bash' How do I make sure that the string #!/bin/bash will ...
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1answer
6k views

Powershell equivalent of `grep -r -l` (--files-with-matches)

In Powershell, how do I list all files in a directory (recursively) that contain text that matches a given regex? The files in question contain really long lines of incomprehensible text, so I don't ...
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3answers
124 views

Grep for block surrounding an error message

I want to grep for the block of logs around a particular error message. Say I know my log looks like this: [----] I, [2014-04-10T19:12:36.294512 #1910:e93004] INFO -- : Started GET "/ems_infra/new" ...
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1answer
102 views

Oddity: “grep” cmd in /etc/network/interfaces

While digging through the birds-nest of network initialisation in our embedded linux setup (Linux SDK on Leopardboard SBC) we've come across what seems like an odd and possibly non-functioning line in ...
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1answer
54 views

command to delete all files with numbers

How can I delete nay file that has a number in its name from directory /www/ and up? Like, it would delete a1.php a2.php 123213.php asdasd5.php Would this work? ls | grep \([1-9]\) -f | xargs rm ...
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2answers
241 views

How to search for a particular pattern in a log file and count the number of matches?

In a very large log file I have entries like : FLOW ENTERING somecompany.somepackage.datacontrol.provider.DataProvider@c37ae61.release() The only change between what differs between entries is ...
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1answer
82 views

Grep and What If 75

I'm trying to run the command from What if 75: cat wordlist.txt | perl -pe 's/^(.*)$/\L$& \U$&/g' | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' '2223334445556667777888999' | grep -P "(.)\1\1\1\1\1" I ...
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How to grep rows that have value less than 0.2 in a specific column? [closed]

ID RT EZ Z0 Z1 Z2 RHO PHE 1889 UN NA 1.0000 0.0000 0.0000 0.8765 -1 1890 UN NA 1.0000 0.0000 0.0000 0.4567 -1 1891 UN NA 1.0000 0.0000 ...
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1answer
29 views

Restrict grepping to non-comment lines

I need to find in Perl source files lines containing bin/exim|SendEmail|Unformatted except of comment lines (lines starting with # with possible whitespace before). I know how to do it with a ...
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2answers
206 views

bzgrep -H pattern file.bz2 gives no filename, but “standard input”

I thought -H always should print filename before matched line. this is true for grep, but not for bzgrep: $ grep -H pattern file1 file1: data pattern data $ bzgrep -H pattern file2.bz2 (standard ...
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2answers
122 views

Why doesn't grep work with single quotes?

I have a bash script wrapped in " " so I need to use ' ' for my grep command but it doesn't work. I can't switch the quotes because then the variables are not expanded. #!/bin/bash PWD=`pwd` source ...
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1answer
40 views

Is it possible to make the “-s” an automatic option on grep?

I'm using Mac 10.9.1. Occasionally in my terminal, I will run grep commands like grep -i -s 'mystring' * Is there a way I can make the "-s" (--no-messages) option, the default whenever i run grep? ...
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1answer
118 views

Extract stings between a delimiter if it matches a certain string

File cat hosts.cfg define host { host_name switchlan alias switchlan address ...
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1answer
781 views

Using grep to filter output of a process

I'm using command | grep -v "JavaScript strict warning" to filter the output of a command (hiding warnings). The grep command works fine when I test it like this: $ printf "JavaScript strict warning: ...
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2answers
57 views

apache mod rewrite - how to determine what file on disk is being hit?

A project that I am newly working on has been around for years, and it has managed to accumulate several hundred rather complex RewriteRules within the Apache conf files. When working with some ...
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0answers
6 views

Grep values from nethog and netperf [duplicate]

I need to monitor the network activities of a process and the bandwidth of the connection. So I decided to use nethog and netperf combine with grep and awk to write the values to a file. nethog ...
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2answers
273 views

Grep values from nethog and netperf

I need to monitor the network activities of a process and the bandwidth of the connection. So I decided to use nethog and netperf combine with grep and awk to write the values to a file. nethog ...
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2answers
96 views

Find all php files which first or second line has more than N characters

I would like to find all php files on my server which first line or second line has more than N characters. I would like to print both the file name and the line content that was found. How would I ...
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2answers
387 views

how to use grep and mv together in a directory in shell?

how do you grep the contents of all files in a directory for "TEST" then move those files to a different directory(like the home dir.)?
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1answer
73 views

Find word that has more than 50 characters in all php files

I am trying to use find in combination with grep to find all the php files in my web server which have a word (any sequence of characters except whitespace) with more than 50 characters. I have this ...
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2answers
118 views

I want to find out word which ends with ()…Use grep

I want to find out word which ends with ()...Using the grep command in linux. grep file_name_where_i_want_to_search "*()" some thing like that....but its not working
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2answers
49 views

How to find files which do not contain their own filename

When using templates to generating files, it's important to include the template's name inside the template. When reading a generated file, it helps you find the template used to generate it. I want ...
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1answer
28 views

How to find files that contain a string in its content OR the path?

Find and grep does not work afaik because I need to create a list of files that satisfy EITHER requirement, not both. I assume this requires more than a one-liner. Any suggestions?
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93 views

moving directories after grep

I have isseued the next command in order to move some directories to the "build_tools" folder however the result was not the one I expected. ls -l | grep 2014-03 | awk '{if ($8!=build_tools) print ...
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1answer
100 views

How to redirect ALL output from a command in Linux

I'm running Gentoo Linux. A program (equery) outputs a massive list of all the currently installed packages (equery list "*"). I want to find out which of them are unstable. Equery marks the unstable ...
0
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2answers
35 views

Find using Grep everywthing that starts with “country=” but not “country=US”

I'm running varnishlog | grep "country=" but I want to find all traffic not originating in US. I need something using OR and NOT .