I have MacBook Pro and I'm running Ubuntu server inside VirtualBox and don't seem to have page up functionality.
How can I scroll up and see missed lines in the terminal when running running Ubuntu server inside VirtualBox?
Can you do Shift + Fn + ↑?
If I remember correctly, Fn + ↑ is page up on macOS.
Finally solved this by running the "screen" command, then pressed control+a, then esc, which then allowed me to either us page up/page down to scroll up/down by the whole screen, or up/down arrow line by line.