http://askubuntu.com/questions/8884/whats-the-risk-of-upgrading-over-sshhttp://serverfault.com/questions/321520/ssh-connection-lost-during-server-upgrade-how-to-reconnect-to-processhttp://serverfault.com/questions/321724/ubuntu-server-upgr…

http://superuser.com/questions/213264/cant-access-select-websites-on-linux-but-can-on-windows

$netstat -tln $sudo ufw status $sudo iptables -L INPUT

http://superuser.com/questions/173821/vpn-through-vpnThe target VPN server I want to connect to allows connections only from one IP address. When I am at my office (the network public IP is trusted on the VPN server) everything is OK, but …