Scrolling with the mouse may work in some labs but Linux labs usually don't scroll.
For example in Linux 9.1.9, you cannot scroll down using the mouse wheel but you would need to scroll with the arrow keys or space bar after using the" | less" modifier. ("ps aux | less" allows you to scroll down with the arrow keys or a page at a time with the space bar so that you can complete the tasks.
Use:
| less
| more