grep out unwanted lines

Shell Programming and Scripting
1

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

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. :frowning:

Thanks for any help.

2 
grep -v -f ip_list logfile
3

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

Thanks worked never used -f before :wink: