0
votes
4answers
55 views

bash event not found trying to match and exclude parenthesis in grep

In a very long line I'll summarize with: (foo),(bar,baz(word,right),(end) I want to print only: (bar,baz(word,right To match the second parenthesis, I exclude the word that follows the ...
6
votes
6answers
340 views

bash find lines starting with string

I have a bunch of files and I want to find which one contains sequential lines starting with a certain string. For example for the following file : Aaaaaaaaaaaa Baaaaaaaaaaa Cxxxxxxxxx Cyyyyyyyyy ...
2
votes
2answers
170 views

filter and count with grep in a single pass?

I am using grep at the end of a set of piped commands to filter some rows out of a file. Afterwards I will want to do some arithmetic based on the number of remaining rows. e.g. ...
2
votes
3answers
50 views

How to list backup files missing corresponding real files?

I accidentally deleted some files spread across my home directory, but I do not know exactly which ones were removed. How can I get a list of all backup files missing their corresponding file? ...
3
votes
1answer
94 views

Is there any drawback to using “grep -E” instead of plain “grep”?

I understand that GNU grep without -E uses basic regex and that grep -E uses extended regex. Is there any harm in using grep -E even for situations that would work with plain grep?
6
votes
2answers
184 views

What's the most efficient way to grep for two completely separate things and assign the values to separate variables?

CentOS 6.x I want to take the output from curl, grep for two completely separate strings, and assign their respective values as variables. What is the most efficient way to do this (without writing ...
3
votes
2answers
83 views

How can I open a file that results from grep?

I often grep a bunch of files to find a line, and then grep returns one result. Rather than copying and pasting the filename into a new command, I'd like to be able to open that one result with an ...
1
vote
1answer
88 views

how do i redirect output from tailf & grep to a file [duplicate]

All I wanted is to grep for specific lines in an ongoing log and re-direct it to some file.. tailf log | grep "some words" Now, I want the above command output to get re-directed to some file in ...
-2
votes
1answer
28 views

Implementation Logic [closed]

I have two files,which is something like this: file1 msgid "New" msgstr "" dsvhuvchvdhcvhc msgid "Old" msgstr "hsvhs" kdnvcjdbvj msgid "Bold" msgstr "" file2 dcbjdsbc msgid "New" msgstr "Alas" ...
5
votes
1answer
94 views

counting multiple patterns in a single pass with grep?

I've written a grep loop to iteratively count DNA trinucleotides within a gzipped DNA fasta file containing DNA sequences e.g. declare -a tri=(AAA AAC AAG AAT CAA .. etc) for i in ${tri[@]} do ...
2
votes
1answer
43 views

using grep --perl-regexp

this is a sample output of ls $ ls -lAF -rw------- 1 martin martin 168 Jan 25 23:26 aaa -rw------- 1 martin martin 168 Jan 25 23:26 bbb -rw------- 1 martin martin 168 Jan 25 23:26 ccc I would ...
5
votes
5answers
109 views

A shell script to write selected fields to a single line

I have a log file trace.log which prints the time stamp, thread name and Transaction method and transaction ID as below. 2014-01-23 15:50:41,724 [catalina-exec-35] INFO TRANSACTION getConnection ...
3
votes
1answer
84 views

Can someone clarify this Bash script

I'm learning something about Bash scripting, and I came across this example: The task is to write a Bash script that reads a file, given with the first argument, pulls out those records that have the ...
24
votes
3answers
482 views

Multicolored Grep

I'm trying to get each grep command to highlight it's results in a different color. I can do it manually with a line like this: ls -l GREP_COLORS='mt=01;32' grep c | GREP_COLORS='mt=01;31' grep o | ...
0
votes
2answers
106 views

Count occurrences of line in multiple files

I have log files that I need to grep and count the number of occurrences of a specific line. Issue is that I must start at a specific line of the first file and only count occurrences after that ...
4
votes
5answers
286 views

Pattern matching across multiple lines

What is a quick and easy way to validate if the pattern "301 domaname.com 200" is present within BASH when spread across multiple lines of output? I was using something like the following: awk ...
21
votes
5answers
1k views

Pipe to multiple files in the shell

I have an application which will produce a large amount of data which I do not wish to store onto the disk. The application mostly outputs data which I do not wish to use, but a set of useful ...
0
votes
0answers
27 views

How to use grep command to find the matching pattern and some more characters? [duplicate]

I have a compressed JS code and I want to find a pattern, but since the file is compresses, it has only a line, and the match pattern is all the file. The output is too much large. grep -r ...
4
votes
2answers
653 views

recursive search for a pattern, then for each match print out the specific SEQUENCE: line number, file name, and no file contents

What I am after is almost exactly the same as can be found here, but I want the format "line number, separator, filename, newline" in the results, thus displaying the line number at the beginning of ...
3
votes
1answer
229 views

How to trick an init script into returning 0

I have a init script which is poorly designed because it does not conform to the Linux Standard Base Specifications The following should have an exit code of 0 if running, and 3 if not running ...
2
votes
4answers
256 views

Zgrep stop after first match when arguments are passed from xargs

I'm using this command to find patterns in zip files (similar to the one) suggested here http://superuser.com/questions/144926/unix-grep-for-a-string-within-all-gzip-files-in-all-subdirectories find ...
2
votes
0answers
217 views

exit code of grep in trap where the script is launched by upstart service

recently I encountered a problem in ubuntu upstart and trap in bash shell. I use ubuntu 12.04 the upstart script(/etc/init/player.conf) is: start on (local-filesystems and runlevel [2345]) stop on ...
9
votes
2answers
607 views

Script to quickly test all keyboard keys

I need to check some notebooks for bad keyboard keys, and so I'd like to speed that up as much as possible. I found nothing for this specific task, so my idea is a script that reads the pressed keys ...
1
vote
3answers
267 views

grep for an alphanumeric strings of any length with a colon on each side

How would you grep for an alphanumeric strings of 1 to 50 characters (ideally, any length would work too) with a colon on each side – a typical result would be all the lines containing the string ...
3
votes
2answers
218 views

grep filter all lines plus one before each hit

I want to parse some output so I exclude all lines that contain either foo or bar, as well as all lines immediately preceding those lines. For example: echo " 1 some line 2 line to exclude because ...
2
votes
3answers
260 views

Command substitution in for loop not working

I want to keep all files not ending with .bat I tried for f in $(ls | egrep -v .bat); do echo $f; done and for f in $(eval ls | egrep -v .bat); do echo $f; done But both approaches yield the ...
2
votes
2answers
91 views

Filtering the result of the find command, so that it returns only directories

Is it possible to get only the results from find that are directory paths? Using find with some option, or using grep or some other utility the results are piped into as a filter? I thought something ...
2
votes
4answers
454 views

How to use the grep result in command line?

When I use grep to find some text which I need, it will display lines containing a match to the given pattern. For example, # grep -r ".*Linux" * path0/output.txt:I hope you enjoyed working on ...
3
votes
2answers
485 views

Optimizing a shell script with long running while loop

I have written a shell script which has to do the following: Capture session commands into one file. Every individual command into separate file. Mail every individual command file content based on ...
2
votes
2answers
236 views

Faster way to find matching patterns from external file grep -f {patternfile} {source} in BASH

In *nix terminal (Bash) os there any other faster way to find a pattern (or excluding them - egrep -v option) than using this: grep -f {patternfile} {source} Using this option is painfully slow for ...
-1
votes
1answer
526 views

if condition, loop in grep [closed]

Could someone please provide help for me. I tried to start writing a shell script but am getting hung up with this issue. I need to grep commands "adb shell ps" and find in it 3 processes with names: ...
4
votes
5answers
623 views

grep for multiple strings in files, and then list the files in the order of size

I am in a folder with lots of .txt file, I would like to find all the files which contain both stringA and stringB (not necessarily on the same line), then list these files in the order of the size ...
3
votes
1answer
284 views

Piping search term (not filename) to grep

I want to pick out certain lines containing a given number from a file. The file I want to search is called os_clusters/piRNA_clusters.bed. awk '{if (a[$0]++ == 0) {split($0,b,"."); ...
1
vote
4answers
69 views

Extract data from line and prepend to the line?

Ok, I have some data in the form: <a href="/praha/jaktovidi/_zprava/jak-to-vidi-rektor-richard-hindls-5-cervna--1220102"> <a ...
1
vote
1answer
56 views

grep curly-bracketed entries from text file

I have a file with many curly bracketed words, ex. {test1}, {test2} - how would I grep for these words and output a distinct list of them? output example: {test1} {test2} I've tried this which ...
1
vote
3answers
117 views

grep for strings that were found in a previous statement

I'm trying to find out if an address definition is used inside of fortigate configuration file. I extracted the section out of the configuration file, that contains the addresses. In that section the ...
2
votes
2answers
357 views

Add a suffix string to end of each line? [duplicate]

I have two files: file01: line1 line2 line3 file02: A B C And I want to get line1 A line2 B line3 C I could possibly write a Perl script but it is better if I don't need to. I have tried ...
0
votes
4answers
85 views

Use grep with or [duplicate]

How do I search in a textfile with grep for the occurrence of a word or another word? I want to filter the apache log file for all lines including "bot" or "spider" cat ...
7
votes
3answers
1k views

how to count total number of words in a file?

I am looking for a command to count number of all words in a file. For instance if a file is like this, today is a good day then it should print 5, since there are 5 words there.
1
vote
2answers
161 views

Split using sed

I have to split [X] ||| you owns the [X,1] ||| you own the [X,1] ||| 1 0.02020 0.07847 0.36788 3 -0.00000 -0.00000 at the pipes and output those line whose 2nd and 3rd argument are different.
2
votes
3answers
380 views

Very strange behavior with grep and IFS

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 ...
5
votes
3answers
316 views

difference between .* and * in regular Expression

I've a file named "test" that contains linux Unixlinux Linuxunix it's linux l...x now when i use grep '\<l.*x\>' , it matches : linux it's linux l...x but when i use grep '\<l*x\>' ...
1
vote
1answer
331 views

What is a sure fire way to find all files and/or path that contains 2 keywords?

I was doing a find . -iname '*sitesearch*' | grep demo because I know the file should be some/path/SiteSearch/demo/SiteSearch.html, but it turned out a person put the file in as ...
0
votes
3answers
929 views

Regular Expression for finding double characters in Bash

I am looking for a regular expression that finds all occurences of double characters in a text, a listing, etc. on the command line (Bash). Main Question: Is there a simple way to look for sequences ...
1
vote
2answers
1k views

Regular expression problem(s) in Bash: [^negate] doesn't seem to work

When I execute ls /directory | grep '[^term]' in Bash I get a regular listing, as if the grep command is ignored somehow. I tried the same thing with egrep, I tried to use it with double and single ...
0
votes
1answer
280 views

ps | grep shows bad output in subshell with jobs running in the background

I am using bash. I have a file named "a2draw" that contains only 1 line: sleep 99999 I start it using this command: bash a2draw & Now, I know and understand the trick with square bracket ...
4
votes
4answers
111 views

Bash-completion and grep

I installed a program (iftop) on Debian Squeeze but some days ago I forgot it's name. I had only this information about the program: 1) It was called *top 2) I could find it using bash-completions. ...
2
votes
2answers
351 views

find all cpp files and list only those files with names that match a pattern (regex) does not work

I have a whole repository of files and I am trying to get a list of files that match a certain criteria. For example, let us say that I want to take all the files that have the string foo1 and ...
2
votes
2answers
485 views

Use of quotes in GNU grep regular expressions

I could see that certain patterns in the GNU Grep can be enclosed within brackets and certain others need not be. For example, matching the beginning of a word works only if it is enclosed within ...
1
vote
2answers
689 views

How to run grep and show x number of lines before and after the match [duplicate]

grep returns just the line where it matched the regex and often what I want to really see is a few (say 2) lines above and below the matched one. Is there a simple way to achieve it? EDIT: OS: Ubuntu ...