Changing timezone without reboot/restarting each service?

[Lev Serebryakov]

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 After changing timezones in Russia (with replacing /etc/localtime
with new file), I found that cron works in "old" timezone till
restart. And all other services do the same, but cron is most obvious
here :)

 Looks like libc reads timezone only once and it could not be chamged
for process without restart (which leads to, effectivly, restart of
whole server).

 Is it known problem? I think, it should be fixed somehow. I
understand, that re-check timezone file on each time-related call
could be expensive, though :(

- -- 
// Lev Serebryakov
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