Security updates - slight confusion

[Ken Walker <ken.walker@manchester.ac.uk>]

I'm getting a little confused about security updates

I'm using Debian stable and daily do the apt-get update/upgrade.

But when a package has a security update, do i have to start/stop specific
applications.


Like today, Python was updated due to a security fix.


Is there any application i have to start/stop or does the apt-get update
refresh all using applications.

How would i know what to start stop as regards Python.


The machine in question is a file server and not the sort of thing i would
like to reboot on every update.

Many Thanks

Ken