Proxmox provides updates on a regular basis for all repositories. To install updates use the web-based GUI or the following CLI commands:

# apt update
# apt full-upgrade
Warning As Proxmox VE uses a rolling release model on top of Debian, performing an apt upgrade may result in a partially upgraded or broken package state. This is because apt full-upgrade can also remove existing packages to satisfy dependencies if needed, while apt upgrade cannot.

For occasionally upgrading Ceph to its succeeding major release, see Ceph Repositories.

Note The APT package management system is very flexible and provides many features, see man apt, or [Hertzog13] for additional information.
Tip Regular updates are essential to get the latest patches and security related fixes. Major system upgrades are announced in the Proxmox VE Community Forum.