Bash commads

examples.sh

 # split string by space
 # awk -F " " '{print $7}'
 # example: show banned ip 
 cat /var/log/fail2ban.log | grep Ban | awk -F " " '{print $7}'
 
 # count unique value
 # sort | uniq -c | sort -nr
 
 # example: count banned unique ip
 cat /var/log/fail2ban.log | grep Ban | awk -F " " '{print $7}' | sort | uniq -c | sort -nr