Add the Proxmox release key

sudo wget https://enterprise.proxmox.com/debian/proxmox-release-bookworm.gpg \
    -O /etc/apt/trusted.gpg.d/proxmox-release-bookworm.gpg

Add the PBS client repository
Create the file

sudo nano /etc/apt/sources.list.d/pbs-client.list

Add this line:

deb [arch=amd64] http://download.proxmox.com/debian/pbs-client bookworm main

Update package lists

sudo apt update

Install the Proxmox Backup Client

sudo apt install proxmox-backup-client

Get a user in the pbs realm in the ui.
PBS>Access Control>Users

fred@pbs

PBS>Access Control>API Tokens
Select your user → create a token.
Example token ID: scripting_token

mark@pbs!scripting_token

write down the Token Secret (Token Password), it will not be shown again and you will need it.

node:8007

fred@pbs!scripting_token@node:8007:datastore_name

Button on the Main Dashboard

export PBS_REPOSITORY="fred@pbs!scripting_token@node:8007:datastore_name"
export PBS_PASSWORD=""
export PBS_FINGERPRINT=""

NAMESPACE="" # must be setup in ui in advance
BACKUP_ID="what exported backupset will be called in ui"
BACKUP_PATH="what you want to back up"

• Make script executable with sudo chmod +x script.sh
• Schedule it in cron or with systemd trigger

MIT