When you are on the go, have you thought about connecting your GNU/Linux PC to the Internet through a USB connection to your phone?

• Using open networks is definitely not recommended. Your connection is not encrypted and others could intercept it. If you have no other choice, connecting to the Internet through a Virtual Private Network (VPN) is strongly recommended.

• Even using an untrusted WiFi network protected by a password (like in a hotel or in a commercial building) is not fully secure. If the password is shared, other guests could intercept your connection and try to attack your PC. Here, a VPN is recommended too.