Which command is used to install packages in Debian-based systems?

The command used to install packages in Debian-based systems is 'apt'. The Advanced Package Tool (APT) is a powerful command-line tool that simplifies the process of managing software packages. It allows users to install, upgrade, or remove packages and also manages dependencies seamlessly, ensuring that any required packages are also installed or updated as necessary.

When you use 'apt', it interacts with the package management system, retrieving package information from repositories defined in the system, and automates the process of handling installations and updates for both core system packages and additional software. This is particularly useful in maintaining system stability and ensuring that all software remains compatible with each other.

While 'dpkg' is also a valid command for managing packages on Debian-based systems, it is lower level and does not automatically handle dependencies like 'apt' does. 'yum' is specific to Red Hat-based distributions, and 'pacman' is the package manager for Arch Linux. Thus, 'apt' is the appropriate choice for managing packages in Debian and its derivatives.