Help with jailbreaking and Cydia for iPhones, iPads, and iPod touches.

There are two ways to change your password on an iOS device. Both require some software to be installed. Note that you'll actually be changing two passwords, both the standard user account (account name is mobile), and the administrator, or root account.

1. On the device

• Install a working copy of MobileTerminal. This can be tricky, as it doesn't have an official repo, so various repos have several different versions. Build 472 is supposed to work fine for 4.2.1, and can be installed through the following Cydia repo: http://www.ijailbreak.com/repository/. 520-1 is also available off the official website (https://code.google.com/p/mobileterminal/) if you know how to install packages on your own.
• Run Terminal, this will bring up a black terminal window.

2. Via SSH

• Install OpenSSH on your iOS device, and restart.
• On a computer on the same network, start up an SSH client (putty, ssh, WinSSH, or whatever).
• Connect to your iPhone (check SBSettings for the IP address).
• User is mobile, password is alpine

Ok, last bit is the same for both. Enter the following commands:

su

Enter alpine as the password

passwd mobile

Enter your new user password twice. Usual password rules, complex but memorable!

passwd

Enter your new root password twice. You might want to have this written down somewhere safe!

That's it, all done!