In an Unraid terminal, the usual way to scroll up through past output is Shift + Page Up ; to scroll back down, use Shift + Page Down. If you’re in a web-style terminal window, the scrollbar on the right should also let you move through the buffer.

Handy options

  • Shift + Page Up / Page Down : most common shortcut in Linux terminals.
  • Mouse wheel / scrollbar : works in many terminal windows, depending on the interface.
  • Pipe long output to a pager like less if you want easier navigation for commands with lots of text, for example: command | less.

If it does not scroll

Some terminal views have limited scrollback, so older output may already be gone. In that case, rerun the command with less, save the output to a file, or use a terminal multiplexer such as tmux for better history navigation.

Practical example

If a command is dumping a lot of lines, this is easier to read:

bash

dmesg | less

Inside less, you can move with arrow keys, Page Up/Down, and press q to quit.

TL;DR: try Shift + Page Up first; if you need better control, use | less.