I installed your apps on my PB740-2. Ran them and after that they disappeared from the app section. Using pbterm I see 'su' in /mnt/secure.
However, cannot connect to it yet using USBnet. 'ip link' does register a extra connection. Gnome keeps complaining that the connection failed. Connecting to the PC, choosing PC-link, disconnecting, connecting, choosing Charging, disconnecting, etc.:
dmesg.log
So something failed, could be my Arch Linux setup: I sometimes have trouble with USBnet on my Kobo H2O, too.
The pocketbook also doesn't register with my router when I use the WiFi, so I can't try it through that IP, too.
EDIT:
arp-scan found it! It's working:
================================================== ==
PocketBook services v2,
http://github.com/ezdiy/pbjb
================================================== ==
root password can be set by saving password.txt
in top folder of storage (/mnt/ext1/password.txt)
root@192.168.2.47's password:
I looked the password up by using pbterm and the command
cat /mnt/ext1/password.txt.
Quite an improvement in typing in the ssh shell instead of using pbterm!