What must you do to ensure interface address changes are persistent through a system restart?

To ensure that interface address changes are persistent through a system restart, it is essential to make the same change in the /etc/network/interfaces file. This file is the configuration file used on many Linux distributions to define the network settings for interfaces. By specifying the interface's IP address, netmask, and other parameters within this file, the operating system will automatically apply these settings upon reboot, thus ensuring consistency and reliability of network configuration.

The /etc/network/interfaces file allows users to set static IP addresses or configure DHCP options, making it a critical component for maintaining network interface settings across system reboots. Changes made in this file will be executed by the network management system during the startup sequence, thereby avoiding the need for manual configuration each time the system restarts.

Other options do not provide a persistent solution. For instance, running a command with sudo only grants administrative privileges for that session without saving changes permanently. Similarly, while changes to the /etc/network file conceptually relate to network configurations, it lacks the specificity required for persistence, as this file is not the standard file used for interface configurations on most systems. Using the ifconfig command is useful for making immediate changes to an interface but does not write those changes to a configuration file, hence they would be