Duplicity CACert Fehler

Seit einiger Zeit funktionierte mein Duplicity Backup nicht mehr.

 Reading filelist /root/backup/exclude-backup-dirs.conf
 Sorting filelist /root/backup/exclude-backup-dirs.conf
 Giving up after 1 attempts. FatalBackendError: For certificate verification a      cacert database file is needed in one of these locations: ~/.duplicity/cacert.     pem, ~/duplicity_cacert.pem, /etc/duplicity/cacert.pem
 Hints:
   Consult the man page, chapter 'SSL Certificate Verification'.
   Consider using the options --ssl-cacert-file, --ssl-no-check-certificate .
 Giving up after 1 attempts. FatalBackendError: For certificate verification a      cacert database file is needed in one of these locations: ~/.duplicity/cacert.     pem, ~/duplicity_cacert.pem, /etc/duplicity/cacert.pem
 Hints:
   Consult the man page, chapter 'SSL Certificate Verification'.
   Consider using the options --ssl-cacert-file, --ssl-no-check-certificate .

Die Lösung ist eigentlich recht einfach und hier beschrieben

 mkdir /etc/duplicity
 cd /etc/duplicity/
 wget  https://curl.haxx.se/ca/cacert.pem

Dann klappt auch das Backup wieder.