Yay! No more annoying process to add MobileTerminal to your iPhone. An iOS 5-compatible version of the popular terminal tool has been added to Cydia. MobileTerminal is an iPhone version of the Mac OS Terminal utility that allows you to change your root password, or SSH your device. Installing MobileTerminal to your iPhone originally required a long process, but now it is one easy tap away.
MobileTerminal makes it possible to run utilities such as OpenSSH right from your iPhone, and it allows you to run system administration tasks from anywhere. It's a great and necessary tool for jailbroken iPhones.
The jailbreak tool is available for free in the BigBoss repo. Just search "MobileTerminal" in Cydia and tap "install" to add it to your device.