Network - Fully Qualified Domain Name (FQDN)

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1 - About

FQDN is the fully qualified domain name. It's the name that the dns returns and consists of one or more domain name separated by a point and therefore organised in a hierarchical way.

[<sub domain>].<domain name>.<tld>

where:

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3 - URL

The DNS Domain Name is needed to define the URLs. This is the value that you would got in the CN of a web server certificate.

keytool -list -v -storetype jks -keystore truststore.jks -storepass changeit
Alias name: alis_name
Creation date: 26-Sep-2019
Entry type: PrivateKeyEntry
Certificate chain length: 1
Certificate[1]:
Owner: CN=hostname.domain.com, OU=Gerardnico, O=Gerardnico, L=Oegstgeest, ST=Netherlands, C=NL
Issuer: CN=hostname.domain.com, OU=Gerardnico, O=Gerardnico, L=Oegstgeest, ST=Netherlands, C=NL
Serial number: 54065f1a
Valid from: Thu Sep 26 05:02:02 UTC 2019 until: Fri Sep 25 05:02:02 UTC 2020

4 - Management

4.1 - Set

The FQDN is generally defined in the Host file

4.2 - Linux