To set an infinite scrollback for screen on Linux Mint 22.3 Cinnamon, add this line to your ~/.screenrc file:

defscrollback 1000000

Steps:

1. Open or create the config file:
   sh

   Copy

   nano ~/.screenrc

2. Add the line above (or use a higher number if needed).
3. Save (Ctrl+O, then Enter) and exit (Ctrl+X).
4. Restart screen or start a new session.

Note: screen has no true "infinite" option—this sets the buffer to 1 million lines, which is effectively unlimited for most use cases. Adjust the number if you need more.