sudo apt upgrade is used in Ubuntu and other Debian-based Linux distributions to upgrade the installed packages on a system.
sudois a command used to execute another command with elevated privileges. It stands for "Super User Do" and is often required for administrative tasks.
aptis the package management system used in Ubuntu and Debian-based systems. It is used to handle the installation, removal, and maintenance of software packages.
upgradeis a subcommand of
aptwhich is used to upgrade the installed packages on the system. It retrieves and installs the latest versions of packages that have new versions available in the repositories.
sudo apt upgrade, the system will connect to the configured package repositories, check for any newer versions of installed packages, download them, and upgrade them to the latest available versions. This command helps to keep the system and its software up to date with the latest security patches, bug fixes, and feature enhancements.