By default, Proxmox allocates less than 300MB to the `/boot` partition during installation. Since Proxmox updates frequently, `/boot` can quickly fill up, leading to upgrade failures. The only solution in such cases is to manually delete old kernels. The Problem…

Step 1: Change the Hostname Run the following command and modify the following three files: hostnamectl set-hostname new-hostname vim /etc/hosts vim /etc/hostname vim /etc/postfix/main.cf Step 2: Backup Backup all files in the `/etc/pve` directory to a local machine. Ensure the…

The first time I encountered this issue, it happened like this: once the Proxmox cluster firewall was enabled, the authentication mechanism of the prokvm cloud management platform would fail. The strangest part was that it was necessary to delete the…