What is the purpose of ETC hostname if its present on the system?

What is the purpose of ETC hostname if its present on the system?

What is the purpose of /etc/hostname, if it’s present on the system? A. It holds the hostname of a package repository server.

How does a hostname work?

The hostname is what a device is called on a network. Alternative terms for this are computer name and site name. The hostname is used to distinguish devices within a local network. In addition, computers can be found by others through the hostname, which enables data exchange within a network, for example.

What should I make my hostname?

So you should see your hostname as a ‘nickname’. Your hostname should be entered according to the example in the hostname field. It should contain a fully qualified hostname such as host.example.com. In order to avoid confusion please use an example other than your domain name.

Why is hostname and IP address mapping in / etc / hosts?

My first question is: Since /etc/hosts is mapping from IP to hostname, why this machine cannot resolve the hostname mongodb to IP 192.168.10.10? Instead, when I run host localhost, it can be resolved and shows:

How to add host name to hosts file?

Adding a host name in the /etc/hosts file. You can add the host name and aliases of the storage system in the /etc/hosts file. You can use the setup command to rewrite the /etc/hosts file.

How to add more than one IP address to a host name?

Add two or more addresses for a host in the hosts file, one real and the others fake. (Make the fake addresses smaller alphabetically.) Open a browser and try to connect to the hostname. Run netstat -no at the same time.

How to resolve hostname in / etc / hosts?

In addition to DopeGhoti’s answer, to test your resolving, inlcuding the /etc/hosts precedence, you can use the getent hosts command. I got similar issues with a /etc/hosts containing multiple spaces between IP and hostname, instead using a TAB. After changing to TAB the hostname could be resolved by ping.