Check List Linux

#Quantidade de conexões do dia no postfix
cat /var/log/mail.log | grep disconnect | grep "Nov 10" | wc -l

# Lista de IPs conectados na máquina
netstat -tn 2>/dev/null | grep : | awk '{print $5}' | sort | uniq -c | sort -nr | head

# conexões abertas em tcp:80
lsof -i TCP:80

#RESTORE PG
psql -f /home/augusto/sistema.prod.dump -h 127.0.0.1 -U user sistema

#Links
http://www.mkyong.com/linux/how-to-block-attackers-ip-with-null-route-command/
http://www.mkyong.com/linux/how-to-encrypt-text-file-in-linux-vim/
http://www.mkyong.com/linux/how-to-limit-the-application-cpu-usage-in-linux-cpulimit/


#https://coderwall.com/p/plejka/forward-port-80-to-port-3000
 sudo iptables -t nat -I OUTPUT -p tcp -d 127.0.0.1 --dport 80 -j REDIRECT --to-ports 3000


cat /var/log/mail.log | grep 'Feb 20' | grep ' connect from unknown'  | grep : | awk '{print $8}' | uniq -c | sort -nr | head

lsof -i TCP | grep nginx | grep ESTABLISHED



cat /var/log/mail.log | grep 'Apr 27' | grep 'Recipient address rejected: Access denied' | awk '{print $19}' | sort | uniq -c | sort -nr | head