grep multiple strings

GEEXTER · 07-10-2003, 06:27 PM

This may be a simple question for some of ya.

I would like to grep with multiple strings.... for example:

netstat -anp | grep 45632 | grep 23000 | grep 1100

I know the above command doesn't work, but I'm looking for something similar. I would like to search netstat for multiple greps. I would like the command to return all lines that have 45632, all lines that have 23000, and all lines that have 1100.

Any clue?

Poetics · 07-10-2003, 06:39 PM

http://www.nevis.columbia.edu/cgi-bin/man.sh?man=grep

I haven't had to grep multiple strings like that, but perhaps grepping the first, routing it to a file, grepping the second, appending the file, and grepping the third, appending to the same file. Then pop open your "results" (or whatever) file and you'll have all your responses. May not be pretty, but at least it's a start, neh?

Dark_Helmet · 07-10-2003, 07:42 PM

egrep my friend... egrep

try this:
netstat -anp | egrep '(45632)|(23000)|(1100)'

regular expressions kick much arse.

GEEXTER · 07-10-2003, 08:00 PM

THANKS GUYS

egrep works great!

Dark_Helmet · 07-10-2003, 08:15 PM

It turns out you can use plain old grep too... After some experimenting:

netstat -anp | grep '45632\|23000\|1100'

That should do the same thing. So the question is:

Which do you like more: backslashes or parentheses?

xfiles_wolvie · 03-27-2004, 11:34 PM

Hi Dark_Helmet,

it seems like you are a expert in grep...can you help me on my thread?..thanks

http://www.linuxquestions.org/questi...hreadid=123327

karthiksb · 07-23-2012, 01:23 AM

Hi Dark_helmet,

i have two lines to supress in one file, how can i do it using "grep -v" command can u please help me in this

thanks,
karthik

sawantt · 12-06-2013, 09:56 PM

i find it very useful. Thank you Dark_Helmet

\ -this is used to suppress the | and then it is used as pipe operator in grep
right?