SSH connection from Debian or Windows to Angstrom, debian, ubuntu, ...

SSH is a protocol which allow to connect two computers securely.
Debian:
you must have a X server installed into your Debian version for have a
graphic interface. If the X server isn't installed you will only have
access to the terminal.
1) SSH connection with interface graphic
CMD: ssh login@ipAdr -p 22 -X
enter your password
CMD: gnome-session
gnome-session == open the gnome interface
gedit == open gedit
...
2) SSH connection without interface graphic
CMD: ssh login@ipAdr -p 22
enter your password

Windows:
if you would like to connect to Angstrom from Windows you can use
"Putty" but you don't have a graphic interface.
https://www.chiark.greenend.org.uk/~sgtatham/putty/download.html

Angstrom:
the beagleboard must be connected into internet.
you must have a sshd installed into your Angstrom version.