Puppy Linux Discussion Forum Forum Index Puppy Linux Discussion Forum
Puppy HOME page : puppylinux.com
"THE" alternative forum : puppylinux.info
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

The time now is Sat 19 Apr 2014, 21:08
All times are UTC - 4

 Forum index » Off-Topic Area » Programming
grep an exact number
Post new topic   Reply to topic View previous topic :: View next topic
Page 1 of 1 [5 Posts]  
Author Message
trio


Joined: 21 Dec 2008
Posts: 1788
Location: अनुमोदना
PostPosted: Tue 09 Feb 2010, 08:52    Post subject:  grep an exact number  
Dear all,

Please help this dummy, I want to grep an exact number, how to do that? And yes, I am stupid.

Example:
in a file you have lines numbered from 1 to 100, you want to grep exactly line number 9, but I do:

Code:
grep 9 /path/to/file.txt


I will get lines numbered 9, 19, 29, etc But I want only line number 9

Thanks
_________________
PET Maker|WbarCC|My Website
Back to top
View user's profile Send private message 
dejan555


Joined: 30 Nov 2008
Posts: 2589
Location: Montenegro
PostPosted: Tue 09 Feb 2010, 09:18    Post subject:  
you can use sed:

Code:
sed -n '9p' /path/to/file.txt

_________________
Back to top
View user's profile Send private message Visit poster's website MSN Messenger 
seaside

Joined: 11 Apr 2007
Posts: 878
PostPosted: Tue 09 Feb 2010, 12:21    Post subject:  
Trio,

Also,

Code:
grep -w 9 /path/to/file.txt


The "-w" matches a single word only

s
Back to top
View user's profile Send private message 
Shel

Joined: 11 Apr 2009
Posts: 103
Location: Seattle, WA, USA, or Southern France
PostPosted: Wed 10 Feb 2010, 05:10    Post subject:  
If the number "9" is at the beginning of a line, you can check for that:
Code:

grep '^9' filename

... of if it's followed with a space, you can check for that:
Code:

grep '9 ' filename

or combine the two, etc. grep will do fairly complex regular expressions, so you can look for a "9" at the beginning of a line, followed by, say, a capital letter:
Code:

grep '^9[A-Z]' filename

I think those are all correct, I'm not in a position to check them at the moment, but doco for grep is all over the 'net.

-Shel
Back to top
View user's profile Send private message 
trio


Joined: 21 Dec 2008
Posts: 1788
Location: अनुमोदना
PostPosted: Wed 10 Feb 2010, 05:26    Post subject:  
Thx all...seaside's answer did the job
_________________
PET Maker|WbarCC|My Website
Back to top
View user's profile Send private message 
Display posts from previous:   Sort by:   
Page 1 of 1 [5 Posts]  
Post new topic   Reply to topic View previous topic :: View next topic
 Forum index » Off-Topic Area » Programming
Jump to:  


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group

[ Time: 0.0408s ][ Queries: 11 (0.0031s) ][ GZIP on ]