I was told, Proxmox creates a file "reboot-required"...
I was writing a guide on how to manually update Proxmox and whether there is a way to check whether a reboot is required.
AI suggested using
ls /run/reboot-required
to check if a reboot is needed after apt dist-upgrade. On my test, three kernel packages were installed, but the file was not created. Has anyone actually seen this file appear on Proxmox after a kernel update?