There are certainly many ways of doing this but here is how I managed to schedule duplicacy on a Linux server (Ubuntu 18.04).
(If you know a better/different way, please add it! Or if I made a mistake (I’m not a Linux expert!), please correct it.)
To start with: I’m running duplicacy as root so that I can backup files from different users in the same backup. If you are just backing up files from a single user, you can probably save yourself a lot of trouble by not using
1. Initialize your repository (mine is called NAS)
cd /srv/NAS/ sudo duplicacy -d init -e NAS webdav://<myusername>@webdav.pcloud.com/Backup/Duplicacy
Make sure you adjust the working directory and the
init command to suit your needs.
You will probably get some errors like
Reading the environment variable DUPLICACY_WEBDAV_PASSWORD Failed to store the value to the keyring: keyring/dbus: Error connecting to dbus session, not registering SecretService provider: dbus: DBUS_SESSION_BUS_ADDRESS not set
Just ignore them and enter the requested passwords (which will trigger another error, but we’ll tackle that in the next step)
2. Save your passwords into your
sudo duplicacy set -key webdav_password -value "this is my webdav passphrase" sudo duplicacy set -key password -value "this is my storage passphrase"
This is probably not the most secure method, but I couldn’t figure out how to get environment variables to work with
sudo… I guess security is okay, since only root has access to the
3. Setup your filters file
See this topic on how to do this.
There shall be no step 4 in this tutorial
5. Run your first backup
Before running the backup automatically, I like to text it manually to see that things are working fine:
Doing something like
sudo duplicacy -log backup -stats
you should not be asked for any password.
You can either let your initial backup run through this way (in that case, perhaps use
sudo duplicacy -log backup -stats & to let it run in the background) or you can stop it and let it be triggered according to schedule (see below).
6. Create a backup script
I want to keep logs of all automated backups and since I did not manage to achieve this on a single line in
crontab, I use a script (which also adds some flexibility):
#!/bin/sh cd /srv/NAS/ echo "`date`" Backing up $PWD ... /usr/local/bin/duplicacy -log backup -stats echo "`date`" Stopped backing up $PWD ...
Save the script wherever it suits you and don’t forget to make it executable. Mine is
7. Schedule the backup
sudo crontab -e
and add something like
30 3 * * * /home/christoph/backup_NAS.sh > /srv/NAS/christoph/duplicacy/logs/NAS_backup_`date "+\%Y-\%m-\%d-\%H-\%M"`.log 2>&1
Adjust paths as appropriate.