What file is used to configure network interfaces in Linux?

The configuration of network interfaces in Linux can be achieved through several different files, depending on the distribution and the method in use to manage networking. Thus, the correct choice of "all of the above" encompasses diverse Linux distributions and their corresponding configuration files.

The first option, /etc/network/interfaces, is commonly used in Debian-based systems, such as Ubuntu. This file contains network interface configuration details and allows the administrator to set static IP addresses, link configurations, and other related networking options.

The second option, /etc/netplan/config.yml, is used in more recent versions of Ubuntu and other distributions that have adopted Netplan as their network configuration utility. Netplan allows users to define network settings in a YAML format, translating these configurations into backend specific settings (like those for NetworkManager or systemd-networkd).

The third option, /etc/sysconfig/network-scripts/ifcfg-*, pertains predominantly to Red Hat-based systems (such as CentOS and Fedora). In this case, individual network interface configuration files that start with "ifcfg-" can be found in this directory, where each file corresponds to a specific network interface and includes settings for that interface.

Since different Linux distributions utilize different configuration files for their network interfaces, it is important to recognize