Data access on Linux

This page explains how to access your Yoda data via the WebDAV interface on Linux.

Connecting to the Yoda WebDAV interface using GNOME files

GNOME users can connect to the Yoda WebDAV interface with GNOME Files (also known as Nautilus in older versions of GNOME).

Click on “+Other Locations” and enter the server address in the “Connect to Server” bar. The server address is davs://data.yoda.vu.nl/

Then click on the Connect button.

You will be prompted for a name and password. Username is your email. Set a Data Access Password and copy it to the Password field.

Connecting to the Yoda WebDAV interface using davfs2

This page describes how to connect to the Yoda WebDAV interface on a Linux system using davfs2. It assumes familiarity with using commandline tools. The instructions are suitable for RedHat-based distributions (e.g. Fedora or CentOS) and for Debian-based distributions (e.g. Ubuntu).

Installing the package

Install the davfs2 package.

For Debian/Ubuntu:

sudo apt -y install davfs2

Confirm that unprivileged users should be able to mount davfs2 volumes (“Yes”).

For RedHat/CentOS/Fedora:

sudo yum -y install epel-release
sudo yum -y install davfs2

Configuring group membership

Look up your user name, uid and gid using the id command.

Add your user account to the davfs2 group: sudo usermod -aG davfs2 user (replace “user” with your user name).

Close the terminal window and open a new one to activate the group change.

Configuring Davfs2

Open the davfs2 configfile in a text editor (e.g. sudo vi /etc/davfs2/davfs2.conf). Ensure parameter delay_upload is set to 0 (zero). This limits the risk of data loss from a failure to flush data after large file transfers.

Open the /etc/fstab file in a text editor (e.g. sudo vi /etc/fstab) and add a configuration line for Yoda:

https://data.yoda.vu.nl /mnt davfs user,auto,uid=1000,gid=1000 0 0

And adjust the parameters as needed: - If you’d like to mount the Yoda in a different location, replace /mnt with a different local directory. - Replace the uid and gid parameters with your uid and gid, as shown by the id command. - If you don’t want Yoda to be mounted automatically after your system starts, remove “auto,” from the options.

First set a Data Access Password.

Now use a text editor to create a secrets file, which contains your Yoda WebDAV URL, Yoda user name and password, separated by spaces. If you are an employee or student at Vrije Universiteit, your user name is your VU email address (in lowercase) and your password is your Data Access Password. External users have usually received their user name via email, along with a link to set their password. Example of a secrets file:

https://data.yoda.vu.nl xxx@vu.nl  myDataAccessPassword

You need to escape any backslashes and double quotes in your password with a backslash (e.g. use \\ instead of \).

Install this secrets file as the global davfs2 secrets file:

sudo install -m 0600 -o root -g root secrets /etc/davfs2/secrets
rm secrets

Mounting the Yoda WebDAV interface

The disk should be mounted automatically after a reboot if you have configured the auto option in /etc/fstab.

To manually mount the Yoda WebDAV interface: - On Debian/Ubuntu: mount /mnt - On RedHat/CentOS/Fedora: sudo mount /mnt (you can ignore any warnings about writing to the mtab file)

Acknowledgements

Thanks to Joost de Graaf for his contributions to this guide.