Linux · Network Configuration

What is the /etc/hosts file for, and what single entry must it always contain?

Answer locked. Get the free KnowCard app to reveal it — plus spaced-repetition review so it actually sticks.

This is one card from the KnowCard library — thousands more across SAP, Linux, Python and more. In the app you get the answer, AI explanations, and cards that come back right before you would forget them. Free to start on iOS, Android or the web.

More in Network Configuration

You edit /etc/network/interfaces on Debian to give your Ethernet card a static IP, but NetworkManager keeps overriding it. What is the underlying rule you violated?

On a headless server you have no GNOME dialogs. Which NetworkManager tools let you configure it, and what is the difference between them?

In the NetworkManager GUI, what single field decides whether an interface gets its address from DHCP versus a static address you type in?

NetworkManager has to coexist with the legacy config systems of many distros. What mechanism lets it do that, and which storage format is now the default?

A Wi-Fi password you saved is now on disk somewhere. Where NetworkManager writes it depends on the distribution — where does Fedora put it versus Ubuntu?

You want your Linux laptop's Wi-Fi card to act as a hotspot for other devices while it gets internet from Ethernet. What hardware-level condition can block this?

Start learning today

Free to start — download the app or use it in your browser.