So you have a nice new shiny Marvell Sheeva Plug computer and you do something [no I wouldn't do experiemental things with mine] that breaks it enough you can no longer gain access over the network. So remedy this, run this command
modprobe ftdi_sio vendor=0x9e88 product=0x9e8fand plug in the Plug to you computer viz the supplied USB cable. That will create /dev/ttyUSB0 by default. No use a serial terminal smulator to gain access. Minicom is what Marvell suggests in the manual, but gtkterm seems to be better. The best though, I find is good old scree. Yep screen. Just run:
screen /dev/ttyUSB0 115200and you're in! You may find your device is on /dev/ttyUSB1 or up, just trial and error to get that sorted. http://www.openplug.org/plugwiki/index.php/Serial_terminal_program#Linux