in reply to About perl -d -e "1;"
Backspace doesn't undo, it deletes one char backwards.
Your description is weird, you should check if some modifier keys like Shift or Alt are blocked.
I don't think it's a Perl problem.
Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery
In Section
Seekers of Perl Wisdom