As a rolling distribution, upgrading Kali Linux is simple. It's recommended to upgrade Kali Linux regularly, to ensure that you will get the latest security updates. To upgrade, use apt update followed by apt upgrade; apt will look for installed packages that can be upgraded without removing any packages, this way being the least intrusive.
For major version upgrades and important upgrades, use apt full-upgrade; this will do a complete upgrade and, if necessary, remove obsolete packages or install new dependencies.
