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02b_domain_name.md

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+# Get own domain-name
+Virtual machines created by hosters (like Hetzner) usually create individual domain names for each VM.
+
+## IP-Address
+First step is to get the own global IP-Address:
+
+```bash
+ip addr
+```
+or to directly filter out the IP-Address:
+
+```bash
+ip addr show eth0 | grep inet | awk '{print $2}' | cut -d / -f 1
+```
+
+## PTR Entry
+next step is to retrieve the PTR entry for the IP-Address:
+
+```bash
+dig -x *ip-addr* @8.8.8.8 +short
+```
+
+## Verify Forward DNS
+last step is to verify if the Type A Record is also set properly:
+
+```bash
+dig -t A *ptr-name* @8.8.8.8 +short
+```
+
+## DNS-Name
+In case the Type A Record resolves to the IP-Address of the virtual machine, it can be used as domain-name in the Browser.
+
+```URL
+http://<domain-name>
+```