Hi again, everybody! I see there were some doubts around here, yes, I did indeed check that the bash script I wrote works. For those who are interested, it is not a big deal, in fact on the Proxmox Wiki this option is given as valid if you intend to restore all the server configuration, basically what I do is copy the / etc / pve routes ( here are basically all the files that shape the Proxmox configuration), / etc / network / interfaces (to have the network configuration already written, this way you just have to relocate the old file in the original path and that's it) and then the files / etc / passwd / etc / group / etc / shadow (to keep the list of users and original groups in terms of PAM authentication. In response to the fact that if you change the physical hardware it may not go well, It is correct, but also uncertain, it really does not matter, since proxmox will map your configuration in the GUI in the same way you had it before, and afterwards with all the mapping in the GUI it is just a question of "reconfiguring" the physical hardware ma way It's convenient, but it's certainly faster than installing proxmox and restoring all vzdump.
Even though here I am going to say the same thing that it says in the proxmox Wiki, this type of backup makes a lot of sense when you run all the information from a network location, for example NFS or Ceph, since the machines will already start right after restore the configuration, if not, it is still useful to have your previous configuration quickly, the compression format I use is tar.gz.
