ipkg install screen
Screen Command Summary
Below is a list of commands that you can issue from within screen. Press CTRL-a and then the corresponding command key to get the effect.
d Detach the current screen session
c Create a new screen session. This new session will give you a brand new command line. You can have up to 10 screen session at a time.
[SPACE] Toggle between screen sessions.
k Kill the current screen session (but leave the rest running)
? Get a list of all possible screen commands.
EG: screen -dmS wget wget http://cdimage.debian.org/pub/cdimage-testing/daily/i386/20050828/debian-testing-i386-netinst.iso
and recover with