borgmatic

apt-get update && apt-get install borgbackup borgmatic
mkdir /etc/borgmatic/
generate-borgmatic-config --destination /etc/borgmatic/config.yaml

• on debian 12.4 borgmatic version is 1.7.7 so use old generate-borgmatic-config command
• make changes to config

  location:
      source_directories:
          - /path/to/directory01
          - /path/to/directory02
      repositories:
          - ssh://<repo>@<repo>.repo.borgbase.com/./repo
  storage:
      encryption_passphrase: "this is a secure passphrase"
      ssh_command: ssh -i /path/to/ssh_key
  retention:
      keep_daily: 7
      keep_weekly: 4
      keep_monthly: 6
      keep_yearly: 1
  consistency:
      checks:
          - name: repository
          - name: archives
          frequency: 1 week
  hooks:
      ntfy:
          topic: borg
          server: https://ntfy.sh
          finish:
              title: $HOSTNAME -> borgbase
              message: borgmatic finished successfully
              priority: min
          fail:
              title: $HOSTNAME -> borgbase
              message: borgmatic failed
              priority: urgent
          states:
              - finish
              - fail

https://torsion.org/borgmatic/