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2024-04-03 22:04:13 +02:00

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Ubuntu

Ubuntu is a Linux distribution based on Debian and composed mostly of free and open-source software.Ubuntu is officially released in three editions: Desktop, Server, and Core for Internet of things devices and robots. Ubuntu is a popular operating system for cloud computing, with support for OpenStack.

How to enable sudo without a password for a user

Open a Terminal window and type:

sudo visudo

In the bottom of the file, add the following line:

$USER ALL=(ALL) NOPASSWD: ALL

Where $USER is your username on your system. Save and close the sudoers file (if you haven't changed your default terminal editor (you'll know if you have), press Ctl + x to exit nano and it'll prompt you to save).

Networking

In Ubuntu, networking can be managed using various tools and utilities, including the following:

  1. NetworkManager: NetworkManager is a system service that manages network connections and devices. It provides a graphical user interface (GUI) for configuring network settings, as well as a command-line interface (CLI) for advanced configuration. NetworkManager is the default network management tool in Ubuntu.

  2. Netplan: Netplan is a command-line utility for configuring network interfaces in modern versions of Ubuntu. It uses YAML configuration files to describe network interfaces, IP addresses, routes, and other network-related parameters. Netplan generates the corresponding configuration files for the underlying network configuration subsystem, such as systemd-networkd or NetworkManager.

  3. ifupdown: ifupdown is a traditional command-line tool for managing network interfaces in Ubuntu. It uses configuration files located in the /etc/network/ directory to configure network interfaces, IP addresses, routes, and other network-related parameters.

To manage networking in Ubuntu, you can use one or more of these tools depending on your needs and preferences. For example, you can use the NetworkManager GUI to configure basic network settings and use Netplan or ifupdown for advanced configuration. You can also use the command-line tools to automate network configuration tasks or to configure networking on headless servers.