Question

multiple argument with grep comman in linux

Asked by: D_wathi

Sir:

how to use two argument search using the grep command in the linux . i want to find the log of two conditions that is one argument is the username and next the argument is the word DELETED

cat /var/log/maillog | grep username # now in addtion i also want the argument DELETED to be used, please help me on this. thanks in advance.

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Asked On
2009-10-13 at 04:44:17ID24807335
Topics

Linux Administration

,

Linux Networking

,

Scripting Languages

Participating Experts
4
Points
500
Comments
12

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Answers

 

by: savonePosted on 2009-10-13 at 04:46:52ID: 25558927

grep -iE "(username|deleted)"

 

by: savonePosted on 2009-10-13 at 04:47:31ID: 25558930

Sorry, the whole thing:

car /var/log/maillog | grep -iE "(username|deleted)"

 

by: KeremEPosted on 2009-10-13 at 05:02:52ID: 25559008

Hi,

If you want to filter out the username first and then the deleted it should be something lke:

grep username /vat/log/maillog  | grep DELETED

 

by: lanboyoPosted on 2009-10-13 at 05:22:36ID: 25559138

savone is correct about this, but to clarify....


To match only lines that have BOTH characteristics you can do something like this...

grep -i username.*deleted /var/log/maillog  

if they are in the order username...<otherstuff>...deleted or    

grep -i username /var/log/maillog | grep -i deleted

as savone says above, using the -i flag with the grep matches both upper or lower case so "Username USERNAME and username" would all be matched.


to match lines that have EITHER the text username OR the text deleted, you can use the egrep syntax that savone uses

 grep -iE "(username|deleted)"  /var/log/maillog

or

egrep -i  "(username|deleted)"  /var/log/maillog


X0.hosts

 

by: KeremEPosted on 2009-10-13 at 05:30:03ID: 25559171

I don't think Savone is correct. Let assume that you have these records:

username GOOD
username BAD
anotheruser DELETED
username DELETED

Then savone's suggestion will display all four.

But I guess what the asker wants to display *ONLY*

username DELETED

which can not be achieved with OR '|" in the egrep expresion

So the correct one should be:

grep username /var/log/maillog | grep DELETED

 

by: D_wathiPosted on 2009-10-13 at 21:31:46ID: 25567258

Thanks for the reply, Sir my request is i want the log of only one username with the condition DELETED  to be accessed.
That is i have an huge log file with many users and also the for example john , he too has many logs but i want to access the log which has the entry of john and the DELETED entry.

Please help me on this.

 

by: TintinPosted on 2009-10-13 at 22:44:48ID: 25567602

Then you already have 2 solutions

grep -i username /var/log/maillog | grep -i deleted


or

egrep -i "username.*deleted" /var/log/maillog

 

by: KeremEPosted on 2009-10-14 at 04:03:09ID: 25569070

As I've already told in my note id  #25559008 and #25559171 already. The solution I've suggested will work for you.  Another alternative is what TinTin has suggested as the second alternative.

I've also presented a test dataset for you in my note #25559171 and shown the solution I've provided  would match only

username DELETED


Cheers,
K

 

by: D_wathiPosted on 2009-10-14 at 04:37:17ID: 25569302

Thanks sir ,
please tell me how to use command by using the grep to access the user( userone) log from 2009-10-10 14:44:23 to 2009-10-10 16:44:20

for the file /ar/log/maillog

Thanks in advance.




 

by: savonePosted on 2009-10-14 at 04:41:37ID: 25569341

With all due respect many people have answered your original question here.  You should award points and create new questions if you feel you need more information.


 

by: KeremEPosted on 2009-10-14 at 04:48:01ID: 25569390

We've all pointed out bout the use

 grep username  /var/log/maillog  | grep "DELETED"

will filter all lines containing username in the file /var/log/maillog then it will be further filtered to all lines containing the word DELETED.

So at the end you will be left with all lines containing username and the word DELETED.

This is it. I have presented you with the sample data. You should be getting waht you asked already.
 

 

by: KeremEPosted on 2009-10-14 at 04:50:14ID: 25569404

The rest is another question as Savone pointed out. All questions must be limited to the context of the original question. otherwise people looking for answers will not get what they are looking for. So please close the question and open another one.

20120131-EE-VQP-002

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