Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Matching text using grep
Top Forums Shell Programming and Scripting Matching text using grep Post 302665759 by Athix on Tuesday 3rd of July 2012 06:46:19 AM
Old 07-03-2012
what if you have 127.0.0.18 and 127.0.0.128 in the file? You will get a match if you look for 127.0.0.1 even if it isn't in there...

grep -i is a wild way of getting some clue for something else and cant be trusted when u look for something in particular. And -i is for case insensitive search and will not hold for numerals and special characters.

!?!?!
 

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Grep Line with Matching Fields

Below is the scenario. Help is appreciated. File1: ( 500,000 lines ) : Three fields comma delimited : Not sorted 1234FAA,435612,88975 1224FAB,12345,212356 File2: ( 4,000,000 lines ) : Six fields comma delimited (Last 3 field should match the 3 fields of File1) : Not Sorted : ... (13 Replies)
Discussion started by: hemangjani
13 Replies

2. Shell Programming and Scripting

Matching white space through Grep

Hello All, I am trying to match white space in patterns through - Grep I tried ] & ] but none of them worked. Then I tried Perl extension '\s' and it worked. So just wanted to know if ] & ] are still supported or have they become deprecated. However they have been mentioned in the... (3 Replies)
Discussion started by: paragkalra
3 Replies

3. UNIX for Dummies Questions & Answers

Issues while pattern matching using grep

Hi, I have a file f1 wi the following data f1.txt ======== Report ID Report Name ----------------------------------------------------------------- Post Requests : 2 Post successes : 2 ============================================= I need to search for the... (2 Replies)
Discussion started by: RP09
2 Replies

4. Shell Programming and Scripting

Grep the non-matching lines

Hi, I need to make a script to extract the number that are not in a file. Example: I have file-A that has 100000 (70000-799999) numbers. And a file-B with number that already are in the system. Now I need to know/get the numbers that are not in system. I was thinking something like this:... (5 Replies)
Discussion started by: AK47
5 Replies

5. Shell Programming and Scripting

Grep text matching problem with script which checks if web page contains text.

I wrote a Bash script which checks to see if a text string exists on a web page and then sends me an email if it does (or does not e.g. "Out of stock"). I run it from my crontab, it's quite handy from time to time and I've been using it for a few years now. The script uses wget to download an... (6 Replies)
Discussion started by: gencon
6 Replies

6. Shell Programming and Scripting

Grep -v (inverse matching)

I am totally unexperienced in writing scripts of any kind. I am working on Mac OS X and would like to run a shell script to find files in a directory that do not conform to a specific naming convention and print to a text file in the same directory. For example, I have a folder called... (9 Replies)
Discussion started by: j_alicea
9 Replies

7. Shell Programming and Scripting

Grep negative matching

is it possible to reverse the output of grep -o (9 Replies)
Discussion started by: squrcles
9 Replies

8. UNIX for Dummies Questions & Answers

Regex matching with grep -l

I am trying to find patterns in files using grep -l -e. I specifically am searching for abc. I want any file that has abc in it, but not just the letters abc. I am searching for a pattern a followed by b followed by c. I have tried egrep -l and also I have tried the following: grep -el... (2 Replies)
Discussion started by: newbie2010
2 Replies

9. Shell Programming and Scripting

Grep with ... matching more than 3 characters

I am trying to understand what the grep command in ubuntu is trying to do here. The contents of my test file is given below harsha@harsha-H67MA-USB3-B3:~/Documents$ cat data abcd efghi jklmno pqr stuv wxyz When I grep for 3 dots (...) without the parenthesis as follows I would expect the... (4 Replies)
Discussion started by: sreeharshasn
4 Replies

10. Shell Programming and Scripting

Matching and where, using grep

May somebody can give me a hint. I want to find using the command "grep" a certain word or term in a foo.txt file. By using the following command grep -i word file1 > newfile4 it puts it into a new foo.txt-file, the n times it matches. Fine, it matches n times, but how could I specify where... (2 Replies)
Discussion started by: 1in10
2 Replies

LEARN ABOUT LINUX

zegrep

ZGREP(1)                                                      General Commands Manual                                                     ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep  options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

                                                                                                                                          ZGREP(1)
All times are GMT -4. The time now is 08:49 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy