A snapshot

[norm]

I would like to create a file -- call it "snapshot" -- that will record things
like the current command history and the value of all shell and env variables.
And, then, at a later time, possibly from a different terminal and invocation
of bash, access the file, so that to the extent practicable, it will be as
though I continued the bash session at the time of snapshot's creation.

Can I do that? How?

Thank you, as they say, in advance.

    Norman Shapiro