Tools - nc (netcat)

nc localhost 8080

SVN - Credentials for corporate proxy

There a simple way to add the credentials to the svn client:

%appdata%\Subversion\servers 

http-proxy-host=proxy-corpo 
http-proxy-port=80 
http-proxy-username=username 
http-proxy-password=password

ssh - Reusing connections [external link]

Basic configuration to reuse ssh connections with OpenSSH v4:
www.revsys.com/writings/quicktips/ssh-faster-connections.html

ssh - Tunneling [external link]

Basic tutorial to create a ssh tunel:
www.revsys.com/writings/quicktips/ssh-tunnel.html

Linux - Dual boot Windows 7 / Ubuntu [external link]

Step by step tutorial to install a dual boot:
www.dedoimedo.com/computers/dual-boot-windows-7-ubuntu.html