Which command is typically used to install software from an APT repository?

The command "apt install" is the standard way to install software packages from an APT (Advanced Package Tool) repository in Debian-based Linux distributions, such as Ubuntu. This command streamlines the process of downloading and installing specified packages, along with resolving and installing any dependencies that those packages may require.

When executing "apt install," the user specifies the name of the package they wish to install. The APT package manager then looks into the configured repositories for the latest version of that package, downloads the necessary files, and installs them on the system, ensuring that all dependencies are also handled automatically.

Although the other options present variations of the APT command, they do not achieve the same result. "apt get" is a legacy command that is still used for various package management tasks, but it requires more specific parameters to achieve installation. The options "apt add" and "apt fetch" do not exist as valid commands within the APT toolset for the purpose of installing software. Thus, "apt install" stands out as the correct and conventional method for this task.