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This question already has an answer here:

I'm using Ubuntu 18.04 LTS. Every now and then, I like to escape the noise of windows by pressing Ctrl + Alt + F3 where I login using to one of the ready to use terminal windows.

If I cat a file and the contents scroll past the screen height, how can I view what's gone off the top of the screen? Pressing Page Up does nothing. Page Down appears to echo a ~ character.

marked as duplicate by Jeff Schaller Apr 17 at 15:41

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You can try Shift + Page Up or Shift + Page Down.

You should also be using more/less to read files, not cat.

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You can use any of the standard terminal utilities to manage the virtual console terminals.

  • screen
  • tmux
  • possible byobu (I don't have experience with this one and am not certain)

You could also use the standard terminal tools like less and more.

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