Proxmox VE Host Backup & Restore Guide#

This guide covers the automated backup and restoration process for all Proxmox VE nodes using the dedicated PVE-only scripts.

Proxmox VE 9 Network Interface Disconnection Warning

On fresh Proxmox VE 9 installations, interfaces are pinned automatically (e.g., nic0–nic5). Overwriting /etc/network/interfaces with a legacy backup containing older naming schemes (such as eno5, eno6, or eno49) will cause the network interfaces to fail on reboot, resulting in a total loss of Web UI and SSH access.

Proxmox Backup Server (PBS)#

1 Installation & Post-Install#

1.1 Post-Install Optimization#

Run this script to configure repositories and optimize settings:

bash -c "$(wget -qLO - [https://github.com/community-scripts/ProxmoxVE/raw/main/misc/post-pbs-install.sh](https://github.com/community-scripts/ProxmoxVE/raw/main/misc/post-pbs-install.sh))"

1.2 Install File Browser#

bash -c "$(wget -qLO - [https://github.com/tteck/Proxmox/raw/main/misc/filebrowser.sh](https://github.com/tteck/Proxmox/raw/main/misc/filebrowser.sh))"

2 Setup VM with SMB Datastore#

2.1 Create Mount Directory#

mkdir /mnt/HP1ProxmoxBackupServer

2.2 Configure Credentials#

nano /etc/samba/.smbcreds

File Content:

username=proxmox
password=private

2.3 Set Permissions#

Change permission to Read-Only by root:

chmod 400 /etc/samba/.smbcreds

2.4 Manual Mount Test#

mount -t cifs -o rw,vers=3.0,credentials=/etc/samba/.smbcreds,uid=34,gid=34 //10.1.1.225/HP1ProxmoxBackupServer /mnt/HP1ProxmoxBackupServer

2.5 Permanent Mount (fstab)#

nano /etc/fstab

Add line: