Services on C&CZ

Uncloud

Fri, 12 Jun 2026 00:00:00 +0200

You were just given an Uncloud cluster. Now what? This howto explains what Uncloud is, why we think its needed and some pointers other documentation. At the end you’ll find a FAQ like section.

We very much want Uncloud to profit from our use, so our intention is to upstream as much documentation as possible. Also see my personal journey with Uncloud; those articles are also in the process of being integrated with the Uncloud documentation.

Data storage

Bram Daams — Thu, 13 Mar 2025 12:36:19 +0000

Introduction

In our Faculty, different types of data storage are offered:

Storage class	Description	Risk for data loss
Home directories	Small (several GB), reliable, backed up storage for individuals	low
Network shares	Larger (1-200 TB), reliable, backed up storage for individuals or groups	low
Local storage	Not backed up storage on desktop computers and cluster nodes, likely to be lost in case of a hardware problem or when the machine gets reinstalled	high

Home directories

Your Science login comes with a home directory of 5GB at no costs. This is a safe place to store your work related documents. Home directories are stored on reliable hardware and backed up automatically. If you need more than 5GB of storage, you can enlarge it on DIY. Before doing so, you may want to clean up some data.

SSH

Wed, 21 Dec 2022 13:20:00 +0000

SSH Secure Shell

SSH is used to get a secure terminal-connection to a login server. All Linux loginservers can be reached with SSH client software.

NB: as of December 2022, not all science logins are allowed to login on the login servers anymore. Should you have trouble logging in on our loginservers, please contact us.

A few secure shell servers are available for Students and Staff of the Faculty (everyone with a Science account). You can use them just as you like, as long as you do not cause problems for other users.

Email

Bram Daams — Fri, 14 Oct 2022 00:00:00 +0200

Tip

Webmail

For quick access to your email, use our webmailer:

https://roundcube.science.ru.nl/

When Roundcube asks for an OTP code, use the one from the OTP app you enrolled in DIY.

Email settings

When setting up your e-mail programs, it is sufficient to only enter your e-mail address. This is what your Science email address looks like:

I.Lastname@science.ru.nl

All technical settings are then automatically filled in for you. If that does not work, or if it is necessary to fill in the details yourself, use the settings in the table below:

GitLab

Bram Daams — Fri, 03 Dec 2021 16:33:36 +0000

About GitLab

“GitLab is an incredibly powerful open source code collaboration platform, git repository manager, issue tracker and code reviewer.” Quoted from the GitLab website

Logging in

Info

VPN

Wim Janssen — Fri, 24 Sep 2021 10:55:58 +0000

VPN

A VPN makes it possible to get secure access to the internet or to the campus network from anywhere. The computer at home (or anywhere on the internet) in the latter case becomes part of the campus network. In this way you can get access to services that are normally only accessible from computers on campus. The most common of such services are connecting to disk shares or to special servers.

CourseFiles

Tue, 23 Jun 2020 16:22:15 +0000

How can I access my course file?

The course files is an network disk that can be attached on campus. Off-campus, VPN must be used to attach this network disk. More info on how to attach a network disk and on using VPN is available. Linux users have the alternative to login with ‘ssh’ on the Science loginserver lilo, followed by cd /vol/cursusdossiers.

Windows:

At ‘File Explorer’, choose the option ‘Map Network Drive’, and type in file://cursusdossiers-srv.science.ru.nl/cursusdossiers and pick your drive letter of choice. By doing so, you will link up the network disk to your local computer. The next options are also possible to get a more limited set of courses: