1 Replies - 608 Views - Last Post: 29 July 2012 - 07:08 AM

#1 Duckington  Icon User is offline

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hostname - confused

Posted 29 July 2012 - 04:12 AM


I am using Plesk control panel on my website and every night it tries to uupdate itself and fails and then crashes completely and I have to reboot the server and flush the iptables just to be able to get into it.

When I look at the error log, part of it says:

Warning: Host name check failed.
Can't detect host 94-76-241-19.static.as29550.net IPv4/IPv6 addresses: Name or service not known

And I also get errors about the hostname when trying to run the update manually.

However, I'm a little confused as to what I actually want to change the hostname...to.

I thought it was supposed to be the domain, so when I run hostname in terminal, it's currently set to: the-reborn.com (that's the domain of my main website on it).

When I go to: /etc/resolv.conf

This is what is in there (I haven't touched this):

domain as29550.net
search as29550.net

And when I go to /etc/hostname there's nothing in that file.

Additionally, If I go to /etc/sysconfig/network I changed the hostname in here the other day, so it now reads:


So my question is this... What should the hostname...actually be? (I've googled for this several times but cannot find any actual answers). And which of these locations do I need to change it in?

FYI: I'm using CentOs 5

Thank you!

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Replies To: hostname - confused

#2 RudiVisser  Icon User is offline

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Re: hostname - confused

Posted 29 July 2012 - 07:08 AM

I believe this is not about the actual computer's hostname, but the reverse DNS on your IP (assuming your server's IP Address is

Depending on where you bought this server from, it should be very easy to configure reverse DNS on that IP to point to a valid hostname (which in turn points to an A record of the reverse DNS hostname and resolves it back to the IP).

So, if's reverse DNS is server1.the-reborn.com, you should have a corresponding A record for server1.the-reborn.com that points to

All that said, that probably isn't your problem. Also, when it comes to choosing what your hostname is, it doesn't matter, it doesn't even need to resolve. I normally go for serverX.domain.com, or give my servers a nickname.
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