Github user AhyoungRyu commented on the issue:
https://github.com/apache/zeppelin/pull/1185
@astroshim Good catch! How about adding 404 page (like github does) instead
of just redirecting `Home` without any message. In 404 page, we can add sth
like "This is not the notebook page you are looking for" with some button for
redirecting to home.
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