[CentOS] fqdn hostname fails after reboot

Thu Feb 9 00:28:12 UTC 2012
Chris <xchris89x at googlemail.com>

2012/2/9 Stephen Harris <lists at spuddy.org>:
> On Thu, Feb 09, 2012 at 01:00:33AM +0100, Chris wrote:
>> Feb  9 00:49:57 x800 postfix[1387]: warning: valid_hostname: invalid
>> character 13(decimal): x800.mydomain.local?
> 13 is control-M.
> One of your config files is in DOS format and has an embedded control-M
> in it.  Check /etc/sysconfig/network.  If you "vi" it, does it show ^M
> at the end, or does the bottom line say [dos] ?
> When you find the file, "dos2unix" will fix it.

Thank you very very much !!

After converting...
[root at x800 sysconfig]# dos2unix network
dos2unix: converting file network to UNIX format ...

Everything works fine :)

But I do not understand why it was in DOS format?