First of all, the device needs to be jail broken. 1. ssh to the device through either wifi or usbnet. I do not see a difference here. 2. mntroot rw 3. cd /usr/bin 4. mv otaupd otaupd.bck 5. mv otav3 otav3.bck 6. ps aux | grep ota You will see four processes here. Ignore the "/usr/java/bin/cvm" and "grep ota". The second column is the process id, note down the ids of the other two processes, otav3 and otaupd. 7. pkill {the id in the output of the last command} 8. pkill {the other id in the output of the last command} or instead of pkill, use reboot command to reboot the device. Then you will know if these two processes would be restarted after reboot.
The otav3 seems like "ota""v3"; I am not sure if it has been changed to v4 recently.
Indeed you do not need to use ssh, if you have koreader, use the terminal simulator in the plugin can do pretty much the same thing.