Strange thing just hapening

Today my server was ok, up and kicking without problems but them, some hours letter when I was going to take a look at some domains, the apache test page was showing up for every hosted domains/subdomains in that server.

To make everything to work again I just restart every service.

Since the only person who have access to this server is me, it's incredible strange, what logs could I take a look to see what have hapening ?

Regards,
LDKS

 

 

 

 

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