Mobile Terminal emulators were not supported on Jailbroken iOS 9 devices. Thanks to Saurik, who just flashed an updated for PAM Modules on Cydia, which is mandatory to run terminal emulators on your iPhone or iPad.
Terminal emulators serve the purpose of changing root password on your iPhone or iPad.
You simply need to open Cydia app and tap on Changes tab located at bottom. From the list, update PAM Modules, size is pretty small; it won’t take more than few seconds. Once you have updated PAM Modules, now search for MTerminal in Cydia and download the same.
For now, we will stick with MTerminal, which is available for free on BigBoss repo. Above all, it is light weight and does not consume much resource. After downloading MTerminal, the first thing you would like to do is to change the default root password. Refer to the guide given below for details.
How to Change Root Password on iPhone or iPad using MTerminal
Step #1. Open Terminal app from home screen.
Step #2. On the terminal screen type passwd (it’s not a typo).
Step #3. Default password is: alpine (case sensitive). Tap Return on your keypad.
Step #4. You will be prompted to enter new password, type in your new password and hit Return.
Step #5. Re-enter your new password to confirm and tap Return key on your keypad.
That’s all; your root password is now changed. Make sure you remember your new password or make a note of your password at some safe place.