Use of hyphen (-) in hostname/machine name

Hi there.
One of our architects is proposing a new server naming policy that would allow the use of hyphens (-) in the hostname or machine name of new servers.
I've pointed out to him that this might not be a very good idea as I've heard of a few problems with Oracle that can be caused by using hyphens in the hostname.
Do any of you know if underscores (_) are allowed instead? Is Oracle happy with underscores in the hostname?
Thanks in anticipation !

Thanks for that Sybrand. I've checked out what you pointed me and it does say that hyphens are allowed.
However, I've just found a conflicting document on Metalink (sorry, MyOracleSupport) Doc Id 477993.1 whereby it causes problems with Siebel environments. It says the following:-
"The hyphen (-) or dash characters are not permitted as valid characters within the Siebel server name. The only valid characters that can be used in the Siebel server name are alphanumeric and underscore characters. Configuring a machine hostname that contains a hyphen character can also cause certain behaviors when running the Siebel Server Configuration Wizard"
So, it's still a bit unclear. I think what I'll do is raise an SR to double-check.
Many thanks.

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Add a new directory with hyphen (-) in the domain name

Dear All,
I'm trying to add a new directory with hyphen (-) in the domain name (default domain *.onmicrosoft.com). As a result I keep getting a validation error: "The domain is not unique". I've tried several
combinations with really awkward words and a hyphen. Such domain names must be unique. I think that the error message is misleading.
Is it a well known behavior? Is it possible to use a hyphen in the domain name?
Thank you for your help,
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Dear Arvind,
Thank you for your effort and time in validating the described behavior.
According to the
Regexp for subdomain question on SO, 'Each subdomain part may contain hyphens (dashes), but may not begin or end with a hyphen'. That been said, the validation error, on your screenshot is appropriate. On the other hand, the validation error
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Kind regards,
Artem

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Hi All,
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Windows User Database Support
ACS supports the use of Windows external user databases for:
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Every time i wake my mac i get This computer's local hostname "D-360.local" is already in use on this network. The name has been changed to "D-444.local".

error message that my local host name is in use and the system generates a new one every time I wake my mac the error mssg reads This computer’s local hostname “D-360.local” is already in use on this network. The name has been changed to “D-444.local”.

There are several possible causes for this behavior.
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2. You have two simultaneous connections to the same local network: probably Ethernet and Wi-Fi. If applicable, disconnect the Ethernet cable or turn off Wi-Fi.
3. A Mac wakes from sleep due to network traffic. This is a bug in OS X that may only affect some models.
4. A device that gets its network address from the router wakes from sleep, and the address it was using before has been assigned to another device.
5. A third-party wireless router has incompatible settings or firmware. In that case, refer to the manufacturer or ISP for support. Restarting the router may help, temporarily.
6. See also this support article.

What does this mean? This computer's local hostname "Linda-Daviss-iMac-4.local" is already in use on this network. The name has been changed to "Linda-Daviss-iMac-5.local".

What does this mean: This computer’s local hostname “Linda-Daviss-iMac-4.local” is already in use on this network. The name has been changed to “Linda-Daviss-iMac-5.local”.
When I came back to my computer this message was on the screen. Should I be concerned ? or doing something?

Sometimes this message means that you have two simultaneous connections to the same local network: probably Ethernet and Wi-Fi. Disconnect the Ethernet cable or turn off Wi-Fi.
Sometimes it happens because a device that gets its network address from the router wakes from sleep, and the address it was using before has been assigned to another device.
Rename the computer in the Sharing preference pane.

Should I ok "this computer's local hostname Irma-Mac-mini-local" is already in use on this network. The name has been changed to Irma2 Mac-mini 2-local

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Don't think this is a conflict with IP Addresses or computer names
= DHCP hangover when computer renews DHCP lease
There is no actual other computer
It just appears that way when reconnects so creates new -2 computer name
What types of names do you use your computers ?
Whether you name them after quantum particles or the romantic poets...
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I get this message:This computer's local hostname "x-8.local" is already in use on this network. The name has been changed to "x-9.local" I have turned off sharing and it continues to upgrade name. What is the fix?

I get this message: This computer’s local hostname “x-8.local” is already in use on this network. The name has been changed to “x-9.local” I have turned off sharing and it continues to upgrade name. What is the fix?

Hi, this is a common problem, mostly just irksome though.
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http://forums.macrumors.com/showthread.php?t=542899
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user10064100 wrote:
Thanks for your replies, I will try that. Version info: 10.2.0, on a Windows Server 2k3. The server runs in a virtual machine, which is pretty much the root of the problem: it tends to change ip addresses when restarting it. I will now install the loopback adapter and see what happens.
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I have a computer on a network that has Microsoft excel installed. On another computer I have an application that will take an excel file and stuff a bunch of data from a database into specific cells to generate a report. The vi works fine on my computer (where excel is loaded locally) but when I try and run the VI and access excel remotely I get an error message as follows:
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Possible reason(s):
Report Generation Toolkit: Microsoft Word or Excel did not open. Make sure Microsoft Word or Excel is installed.
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All the best,
Fred V -- Product Support Engineer -- LabVIEW R&D -- National Instruments

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Hi DDDDD(etc),
Check out the Oracle Application Server Administrator's Guide section 7.2 - it details the instructions.
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[HKEY_LOCAL_MACHINE\Software\Novell\Zenworks]
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On Tue, 09 Jan 2007 21:30:14 GMT, [email protected] wrote:
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http://forge.novell.com/modules/xfmo...ect/?zfdimgdrv
Live BootCd and USB Disk from Mike Charles
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eZie http://forge.novell.com/modules/xfmod/project/?ezie
Marcus Breiden
If you are asked to email me information please change -- to - in my e-mail
address.
The content of this mail is my private and personal opinion.
http://www.edu-magic.net

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Use of hyphen (-) in hostname/machine name

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