.__ __ .__
_____ |__|________/ |_|__|_______ _____
/ \| \___ /\ __\ \___ // \
| Y Y \ |/ / | | | |/ /| Y Y \
|__|_| /__/_____ \ |__| |__/_____ \__|_| /
\/ \/ \/ \/
grep -Eo '([0-9]{1,3}\.){3}[0-9]{1,3}' tux_so.access.log | sort | uniq >> filename.txt
extract all ips from log