DNS and Hosts Resolution
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DNS and Hosts Testing
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dig domainnamedig from a specific DNS server
dig domainname @DNS_ServerIP====================================================================================
DNS and Hosts Configuration
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/etc/resolv.conf
DNS servers can be configured for linux systems within /etc/resolv.conf.
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/etc/hosts
The /etc/hosts file can be thought of as essentially a local DNS configuration. This means that DNS entries can be mapped here, overwriting any DNS entries provided by an external service.
Entries into the /etc/hosts file can be formatted as follows:
IPaddress
IP domainname------------------------------------------------------------------------------------------------------------------------------------------