Tools

FileZilla
rsync
SSH
SFTP
PuTTY

Tutorials

How to launch an AWS EC2 instance
How to connect two computers using a crossover cable
How to make a network cable
How to setup static IP address on Linux
How to setup and use SSH server on Linux
How to turn an old PC into a NAS server
How to setup GNS3 on a remote server
How to setup Cisco Packet Tracer on a remote server
How to build a static website on AWS in 5 easy steps