csh
has the command !!
to repeat
the last command executed. screen
provides a primitive way of
recalling "the command that started ...": You just type the first
letter of that command, then hit C-a { and screen
tries to
find a previous line that matches with the prompt character to the left
of the cursor. This line is pasted into this window's input queue. Thus
you have a crude command history (made up by the visible window and its
scrollback buffer).
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