[Offermann]

host `hostname`

thielpark-com does not exist (Authoritative answer)

That is because hostname is not the domain name. This works:
host `hostname --fqdn`

thielpark.com A 78.46.43.66

cat /etc/hosts

### Hetzner Online AG installimage
# nameserver config
# IPv4
127.0.0.1 localhost
78.46.43.66 thielpark.com thielpark-com
#
# IPv6
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
cat: file: No such file or directory

dig thielpark.com mx

; <<>> DiG 9.3.4-P1.1 <<>> thielpark.com mx
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 7595
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;thielpark.com. IN MX

;; ANSWER SECTION:
thielpark.com. 28584 IN MX 10 thielpark.com.

;; Query time: 2 msec
;; SERVER: 213.133.98.98#53(213.133.98.98)
;; WHEN: Sun Jul 20 16:40:40 2008
;; MSG SIZE rcvd: 47

dig thielpark.com any

; <<>> DiG 9.3.4-P1.1 <<>> thielpark.com any
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 38408
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;thielpark.com. IN ANY

;; ANSWER SECTION:
thielpark.com. 28555 IN NS ns1.domaindiscount24.net.
thielpark.com. 28555 IN NS ns2.domaindiscount24.net.
thielpark.com. 28555 IN NS ns3.domaindiscount24.net.

;; Query time: 1 msec
;; SERVER: 213.133.98.98#53(213.133.98.98)
;; WHEN: Sun Jul 20 16:41:09 2008
;; MSG SIZE rcvd: 105

I do not quite see how this information relates to the question. Could you please explain?

Thanks, regards
Philipp