Comments on: Search Multiple Words / String Pattern Using grep Command

By: Matt

Matt — Wed, 18 Jan 2012 10:44:46 +0000

Thank you for this. I couldn’t figure out why it wasn’t working.

By: Ramon

Ramon — Thu, 08 Dec 2011 21:10:51 +0000

Great info site.
I have a need to search a file looking for dates and a string, For example:
(Dec 2 13:25:27 name local5:warn|warning vmdaemon[180412]: #415 Moved volume tape_1 #0055 (12345678) (abc123 from online to offline.). I need to search for a date and the “online to offline” string together. Also, with grep is it possible to do a date range in the search as oppose to a single date?

By: Abdulla

Abdulla — Wed, 19 Oct 2011 19:22:06 +0000

Could you please help me regarding while connect putty Linux based logs like collect grep is working

tail -f test_log | grep ‘\” 50[0234]‘ – working

tail -f test_log | grep ‘\” 50[0234]‘ | grep “404″ – not working

Any one help me on this regard? how to collect 1.500 to 504 2.404 alone.

By: Jass

Jass — Mon, 26 Sep 2011 20:17:28 +0000

/usr/xpg4/bin/grep -E ‘error|critical’ sample.txt

this works for me..

By: pop richards

pop richards — Tue, 30 Aug 2011 12:56:47 +0000

grep -n “$search1″ . | grep -n “$search2″ | grep -n “$search3″

after the first grep only statements “search1″ will come. this is filtered by the next grep creating and AND condition.

this is a round about solution coming out the top of my mind. if i find a better solution i’ll post it.

By: Mats

Mats — Tue, 30 Aug 2011 12:37:09 +0000

Hi,

I have a requirement in which I would need to grep/find a line based on matching 3 different patterns. I know we can grep with -E multiple parameters seprated by pipe but this work Pipe (|) as OR condition. My requirement is I want to use AND condition. It should show line where it satisfy both the parameter.
e.g. line in a file as –
10-Aug-2010 Hello, this is a new example for unix.
I need to show this line only when my grep command matches all 3 words
this, new, unix How to right such grep command ?

By: Saravanan

Saravanan — Tue, 23 Aug 2011 04:43:38 +0000

hi, i want to grep the lines which has Eg:”uat” string in the but not “#” string in the line.. can anyone help me out in this????

By: anoop

anoop — Wed, 27 Jul 2011 09:55:36 +0000

use
grep ‘rob’ | grep ‘bob’

By: Hemal

Hemal — Thu, 07 Jul 2011 12:08:05 +0000

Fantastic !! I had a scenario where in I had to pick up lines from a log file based on a word. Unfortunately I had 1000 such words and so it would have been difficult to find 1000 lines. But this solution really helped. Thanks.

By: Anthony

Anthony — Mon, 20 Jun 2011 22:32:14 +0000

That won’t work if you need to check if word 1 and word2 are anywhere in the file, because the first grep returns the matching line, so the second grep would only match if both words were on the same line.

By: richardspop

richardspop — Tue, 17 May 2011 12:11:08 +0000

its
grep -n “error:*” filename

since its one file -r is not necessary.

By: richardspop

richardspop — Tue, 17 May 2011 12:09:28 +0000

do u have any keyword to identify the error message??
for eg. if the keyword is ‘error:’

then

grep -rn “error:*”

By: nithya

nithya — Tue, 17 May 2011 10:09:31 +0000

hi.
how to search a single line using grep command..
for example a file having 100 lines in that 100 line only one error line is there.

how do i retrive that single line using grep command.. i don’t know in which line in that error msg and like that error msg many of the lines in that file.. how do i find using ‘Grep’ command..

By: ajorpheus

ajorpheus — Wed, 11 May 2011 16:25:18 +0000

@Kumar and others To search for multiple strings in a file try doing this :

grep -il "String1" "PATH-OF-FILE" | xargs -I % grep -H "String2" % | xargs -I % grep -H "String3" %

For eg: Let's say I want to search for all those log4j.xml files which have the words CONSOLE and ASYNC in them .. then this is what I would do :

find "/cygdrive/e/MyDocs/Downloads/work/OATS Domain related/" -iname "log4j*.xml" | xargs -I % grep -ilr "CONSOLE" "%" | xargs -I % grep -H "ASYNC" %

Cheers!

By: kumar

kumar — Mon, 25 Apr 2011 09:10:04 +0000

Hi,
I need to list the files which contains the 3 strings
HEAD
These all 3 strings may be in different lines.

Thanks, Kumar

By: karatedog

karatedog — Sun, 20 Mar 2011 20:03:31 +0000

First: grep is a single line utility. And because “5)” is on two lines, grep will find them, because it walks down the lines, and matches them to your rules, period.
Second: what grep finds, that ‘entire’ line will be displayed. So it is not possible to cut the “5)” from the beginning of the line, and display the rest.
If you want to find “ram” and after that the next “5)”, you need to use some utility that allows you to implement some logic. Like awk.
However if you can ensure that “5)…” will be after the found line – like “ram” – then you can use the ‘after context’ feature of grep, whic displayes the matching lines PLUS some line after that.

By: vaibhav

vaibhav — Sun, 20 Mar 2011 09:28:03 +0000

I have to grep exact line in file
for eg : file name test.txt includes
ram
5) 1,2,3
sohan
5) 6,7,8

so i want to grep ram and 5 so the output shud be
ram
1,2,3

should not be
ram
1,2,3
6,7,8

By: richardspop

richardspop — Tue, 08 Mar 2011 10:07:13 +0000

try
$grep -r “word1″ /Folder/subfolder/ | grep “word2″ > search.log

By: Ritika

Ritika — Thu, 16 Dec 2010 08:31:23 +0000

How to search multiple words in separate lines, inside a directory including sub-directory? Pls. give easy example.
I tried $grep -r “word1″ |grep -r “word2″ /Folder/subfolder/ > search.log

By: Dr.Death

Dr.Death — Wed, 13 Oct 2010 10:57:08 +0000

try
echo “hi rob, where is bob?” | grep -E -o “rob|bob”

it should return:
rob
bob