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grep out unwanted lines

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# 1  
Old 03-19-2010
grep out unwanted lines
Hi,

I got a log file and I want to grep out a list of unwanted line which are IP's.

Basiclly I want everything ecxept the ip's from my list.
If I do a

Code:
while read line
do
  grep -v $ip_from_my_list logfile
done <ip_list

it just grep's one IP at a time and repeats. Smilie

Thanks for any help.
Last edited by Franklin52; 03-19-2010 at 07:12 AM.. Reason: Please indent your code and use code tags!
# 2  
Old 03-19-2010
Code:
grep -v -f ip_list logfile

# 3  
Old 03-19-2010
What you are looking for is the "-f <file>" option of grep. Have a careful look into the neverending tome of Unix knowledge (for mere mortals: issue "man grep") and investigate how you could provide grep with a list of patterns from a file.

I hope this helps.

bakunin
# 4  
Old 03-19-2010
Thanks worked never used -f before Smilie
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