You need to use the following key combination to scroll up and look at your data under GNU screen. First press: CTRL-A + [ This will activate copy mode in GNU/screen. Now, you can scroll up/down and look at your data. Use the following keys: CTRL-u and CTRL-d scroll the display up/down by the specified amount of lines while preserving the cursor position. (Default: half screen-full). CTRL-b and C-f scroll the display up/down a full screen. For searching use the following vi like syntax: /SearchWord – Vi-like search forward. ?SearchWord – Vi-like search backward.