First, make sure that you have a "rooted" Android cell phone so you can do things like run Terminal and execute the su command to obtain root privileges.

In a terminal (the command line window found in the Accessories menu), using either of the two commands below show you who else is logged in and how long they've been idle.

However, even if I wrote twice as much Ruby code, the total number of lines that I typed into an editor or the command line of my terminal shell is less than 100 lines.