How to see more lines in the terminal
Like David Purdue suggests, I myself too. I like to have unlimited scrolling.
You can also enable the scrollbar if you want; but I prefer it disabled and use Shift + Page Up and Shift + Page Down keys to change the output frames.
Use less:
your_command | less
Your Enter key will take you down.
Also, press q to exit.
If you are using the standard Terminal program on a Desktop version of Ubuntu...
Choose Edit -> Profile Preferences from the terminal windows global menu.
Choose the Scrolling tab
Set Scrollback to the desired number of lines (or check the Unlimited box).
Then you can use the scrollbar at the side of the terminal to scroll back through the lengthy command output.