On 2018-07-10, Martin Gregorie  wrote:

> ... a seemingly little-known fact, applicable to all Unices, Linuxes
> and  (IIRC) BSD derivatives, is that you can delete an open file while
> a program is using it without any bad effects. The same applies to the
> executable file itself.

[explanation snipped]

This makes it trivially easy to update a running program.  On the other
hand, one of the most FA'd of Qs in Windows discussion groups is how
to update a running program.  Answers tend to go through horrendously
convoluted explanations, invariably involving a reboot, before generally
settling on the simplified answer: you can't.  It's a total pain in the ass.

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