joachim.backes(a)rhrk.uni-kl.de wrote:
Cameron Simpson wrote:
> On 08Sep2008 21:04, Kevin J. Cummings <cummings(a)kjchome.homeip.net>
> wrote:
>> Alan Evans wrote:
>>> On Mon, Sep 8, 2008 at 6:40 AM, Steven Tardy <sjt5(a)its.msstate.edu>
>>> wrote:
>>>> kwhiskerz wrote:
>>>> man hostid
>>> On my Fedora 9...
>>> $ hostid
>>> 00000000
>>>
>>> Now I haven't bothered to check any other machines, but my initial
>>> impression is that this is not going to work...
>> I just checked the hostids on my 2 primary machines on the same
>> local network. They just seem to be encodings of the machine's IP
>> addresses. And since both are PC class machines, the addresses look
>> to be syllable swapped (but not byte swapped).
>>
>> 192.168.6.94 and 192.168.6.106
>> a8c05e06 and a8c06a06
>>
>> So, I have to ask, does the machine you tried it on have an IP address?
>
> So, let us turn to the docs: man hostid says:
>
> hostid - print the numeric identifier for the current host
> [...]
> The full documentation for hostid is maintained as a Texinfo manual
> [...]
>
> Gah. I hate this info-so-no-f'n-man-page rubbish!
> But let's go: info hostid:
> 21.4 `hostid': Print numeric host identifier.
> =============================================
> `hostid' prints the numeric identifier of the current host in
> hexadecimal. This command accepts no arguments. The only options are
> `--help' and `--version'. *Note Common options::.
> For example, here's what it prints on one system I use:
> $ hostid
> 1bac013d
> On that system, the 32-bit quantity happens to be closely related
> to the
> system's Internet address, but that isn't always the case.
>
> Gah! Again!
>
> I don't think I'd rely on hostid for anything:-(
>
> Cheers,
Hi,
seeing the same (using dhcp for getting an ip address):
backes@eule [backes]: hostid
00000000
backes@eule [backes]: ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:76:C0:40:36
inet addr:192.168.179.182 Bcast:192.168.179.255
Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:284 errors:0 dropped:0 overruns:0 frame:0
TX packets:256 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:86392 (84.3 KiB) TX bytes:25620 (25.0 KiB)
Interrupt:22 Base address:0x2000
Not seeing this effect on systems without dhcp usage.
Regards
FYI, the hostid does not use information from ifconfig. It looks for a
match between "hostname -s" and information in /etc/hosts. It then uses
the IP address contained there. No match then hostid returns 00000000.
--
Television is a medium because anything well done is rare. -- attributed
to both Fred Allen and Ernie Kovacs