install duplitab as root

tasks/main.yml

@@ -13,6 +13,7 @@
   apt:
     deb: '{{duplitab_package.dest}}'
     state: present
+  become: yes
 - name: generate backup config
   set_fact:
     source_type: "{{item.0.source_host is defined | ternary('sshfs', 'local')}}"