The license for Mathematica has been expanded temporarily to an unlimited campus license for the whole of 2023: all employees and students may use Mathematica unlimitedly in 2023 on the RU network. For home use, one must therefore use a VPN. The software can be found on the C&CZ Install disc. During the installation you must specify: License server: mathematica.science.ru.nl License: L4601-6478 The introductory course “Mathematica Basic Principles: An Introduction” can be taken for free at CANdiensten in Amsterdam....

RU ILS Connectivity is replacing network access switches in FNWI. This causes short disturbances of network connectivity for wired and wireless systems on several evenings between 19:00 and 23:00 hours for affected wings/locations, i.e. connected to a specific SER (Satellite Equipment Room). For wired network outlets, one can check whether they will be affected by looking at the outlet number (starting with the SER number for affected systems) or visiting FNWI ethergids....

Science Jitsi Security As of January 18th, 2023, starting a jitsi meeting room requires you to authenticate with your science login and password. Guests do not require any authentication once the session is running. Jitsi is a collection of free and open-source multiplatform voice (VoIP), video conferencing and instant messaging applications for the web platform, Windows, Linux, macOS, iOS and Android, of which Jitsi Meet videoconferencing is the most well-known.

A new version of Mathematica (13.2.0) has been installed on all C&CZ managed Linux systems, older versions can still be found in /vol/mathematica. The installation files for Windows, Linux and macOS can be found on the Install-disk, also for older versions of Mathematica. Installation and license info can be requested from C&CZ. According to the Mathematica Quick Revision History: “Version 13.2 introduces new functionality in astronomy and compilation, as well as substantially enhancing functions for machine learning, trees, mathematical computations, video and more....

The C&CZ administered “4 concurrent user” license for Maple has been continued until December 31, 2023. The latest version of Maple, Maple2022.2, for Windows/macOS/Linux can be found on the Install network share and has been installed on C&CZ managed Linux computers. License codes can be requested from C&CZ helpdesk or postmaster.

Since midnight there is a problem using Adobe Acrobat Pro DC, you are asked to activate the license. ILS is working on a solution. You can open PDFs using Adobe Reader or some other PDF reader. See: https://meldingen.ru.nl/detail.php?id=1333&lang=en&tg=0&f=0&ii for the original notice.

C&CZ is pleased that recent vacancies have been filled. A year ago Eric Lieffers joined us as systems developer / sysadmin. For years, Eric worked as sysadmin at the Faculty of Social Sciences and at ISC/ILS. Last month, Miek Gieben joined the systems developer / sysadmin team and Alexander Greefhorst joined as developer. Miek studied Computer Science in Nijmegen and has now returned to Nijmegen after having worked for a.o. SIDN, Google and Goldman Sachs, most recent years as Site Reliability Engineer....

Just before 23:09 quite a lot of ceph storage nodes became unreachable. This seems to be due to one of the redundant links between two datacenter locations failing for about 4 seconds. This triggered a whole slew of ceph osd processes being killed off and not starting again. A generic configuration change made for all our servers generated an extra interface, which confused some of the osd processes (depending on interface ordering) when starting up....

For the majority of the services C&CZ uses free software and open source software. Therefore, some time ago C&CZ decided that each year the employees vote which projects receive a donation from C&CZ. This year Project Jupyter was chosen as new recipient. Project Jupyter is a non-profit, open-source project, born out of the IPython Project in 2014 as it evolved to support interactive data science and scientific computing across all programming languages....

Tip Webmail For quick access to your email, use one of these webmailers: https://roundcube.science.ru.nl/ https://rainloop.science.ru.nl/ 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:...