Which command is used for package management in a Debian-based Linux system?

In a Debian-based Linux system, the package management command "apt-get" is utilized for managing software packages. This command allows users to install, upgrade, and remove software packages from their system. Specifically, it interfaces with the Advanced Package Tool (APT), which is responsible for handling the retrieval and installation of software packages, ensuring that all dependencies are resolved during the process.

For instance, when a user wants to install a new package, they can use "apt-get install package-name" to download the necessary files from the repository and install them on their system. Additionally, "apt-get" can also be used to update the package list with "apt-get update" or to upgrade installed packages with "apt-get upgrade." This makes it a fundamental tool for maintaining the software environment on Debian-based distributions like Ubuntu.

The other choices refer to different package management systems not used in Debian-based distributions. "Yum" is used in Red Hat-based systems, "pip" is a package manager specifically designed for Python packages, and "dnf" is a newer package manager for Fedora that replaced yum. Each of these tools serves a distinct purpose within their respective environments but does not apply to Debian-based systems.