installing a .deb file on an iPhone

If you need to install a .deb file on an iPhone (jailbroken with openSSH installed and running), do the following:
upload to /tmp
ssh root@10.0.2.3 (use your actual iPhone IP address!)
dpkg -i /tmp/name.deb (use the actual name of your .deb file!)
Restart iPhone
Image from iPhone Techies.