Terminal Emulators? What can you do?

You need to root your phone to get root permissions.

 

I use mine to move the preinstalled software to another directory, to monitor system performance, and I wrote a script to mount/umount /system so I don't have to type it in all the time.

If you have a version of busybox that has cron, I've read you can schedule daily reboots.

Other than that I just play with it because I can.
I use better terminal emulator pro, it comes with bash and its own version of busybox, unfortunately cron is not included.