Howto

Installing a PC When installing a new PC you have several options. If the PC is not connected to the network, C&CZ can offer little or no help to install your PC. You can borrow DVD/CD’s with a Windows Operating system and application software like MS-Office, etc from C&CZ . If the PC is connected to the network via a (PXE enabled) network interface, a fully automated installation of Windows with standard applications is possible. In this case your PC becomes a beheerde werkplek PC. Also it is possible to install, fully automated, Ubuntu Linux with standard applications on the PC. In both cases contact C&CZ to register your PC.

The system clocks on C&CZ managed Linux machines are being kept up to date by using the Network Time Protocol (ntp). Each machine checks at regular intervals its system clock with several designated machines on the network and adjusts their system clock when needed. Whenever the difference between the local system clock compared to the system clock of other servers gets bigger than half a second the clock will be adjusted. If the difference is smaller, the system clock will be adjusted in small steps by slowing down or accelerating a little, to avoid multiple large time adjustments. Because all systems adjust their system clock to the same ntp servers, all system clocks will eventually become synchronized. The local servers are ntp1.science.ru.nl and ntp2.science.ru.nl. ...

Disposal Safe disposal of IT equipment and data carriers The FNWI Housing & Logistics (HL) department manages a contract with an external specialized company for the secure destruction/shredding of data carriers on location. The secure metal container that is used as a temporary cache, can be found at C&CZ as of September 2022. Employees and students of the Faculty of Science can put data carriers with sensitive data in the container themselves at C&CZ. The C&CZ helpdesk can help recognizing and removing data carriers from desktops, laptops etc. ...

C&CZ manages a large number of machines that anybody with an Science-account can use. Students can also login to the PC’s in the computer labs, the study area and the library with their S-number and RU-password, in the RU-domain on MS-Windows. All computer labs are dual boot: during startup of the PC one can choose to boot Linux (Ubuntu) or Windows. Available computer labs The Science Faculty provides the following computer labs: ...

Mozilla Thunderbird is free and open-source email client software. Below are instructions to configure Thunderbird for RU MS365 mail and for Science mail. Configure Thunderbird for RU MS365 mail. The RU MS365 instructions do not mention Thunderbird, but there is a RU created set of instructions (pictures in Dutch). Configure Thunderbird for Science mail. NB: For a self managed pc after installing Thunderbird you’ll have to uncheck Launch Mozilla Thunderbird now and click Finish. Last installation dialog screen ...

Thunderbird tags In Thunderbird you can tag a message with one or more tags by clicking on the message with the right mouse button and choosing Tag. There are five standard tags with descriptions Important, Work, etc. If the mail server is an imap server like post.science.ru.nl, then the tags are stored on the server, which means that every Thunderbird will show the tags. It is somewhat more complicated for new tags that you can create. Thse are also stored on the imap server, but will initialy not be visible in other Thunderbird programs. One can make a new tag by clicking with the right mouse button on a message and choosing Tag -> New Tag… or using the menu Tools -> Options… -> Display -> Tags -> Add. The tag name will be used both as internal tag name and as visible description. If you alter the tag name later on, then the internal tag name will remain the same. The internal tag name (i.e. the initial tag name) will be used as tag on the imap server. A new tag will only be visible in another Thunderbird if a tag with the same internal tag name exists. So it is important the choose the right initial tag name. In particular one has to agree on a tag name if the mailbox is shared. After that everyone can change the colour and tag name, without consequences for the visibility of the tags. ...

C&CZ’s Not Frequently Enough asked questions with answers! Last modified: 2018-03-21 For questions, contact us. About this FAQ Contributors Patrick Atoon patricka@cs.kun.nl Kees Keijzers keesk@science.ru.nl Jos Alsters josal@science.ru.nl Peter van Campen Peter.vanCampen@science.ru.nl Simon Oosthoek S.Oosthoek@science.ru.nl Linux shells What is a shell? The shell is a program that interprets the user’s commands and executes them on the Operating System. There are many kinds of shells, which have different interpreted languages in which to write commands. ...

The program FoxIt PDF Reader can be used as an alternative to Adobe Reader, it is a free program to view or print PDF files. One reason to sometimes not use Adobe Reader is that Adobe Reader 8 produces PostScript that HP4250/HP4350 printers can’t handle, not even after a firmware upgrade. Therefore C&CZ switched to using the (slower) PCL-driver for almost all HP4250/HP4350 printers.

JupyterHub is a multi-user Hub that spawns, manages, and proxies multiple instances of the single-user Jupyter notebook server. It can offer notebook servers to a class of students, a scientific research project, or a high-performance computing group. Please contact C&CZ if you plan to use or are interested in using the JupyterHub for your course or project. Login The JupyterHub is available via https://jupyterhub22.science.ru.nl and you can login with your Science username / password combination. ...

NBGrader is a system for assigning and grading Jupyter notebooks. Student Interface Using the assignment list extension within the JupyterHub, students may conveniently view, fetch, submit, and validate their assignments. For details see: https://nbgrader.readthedocs.io/en/stable/user_guide/highlights.html#student-interface Instructor Interface The NBGrader services guide the instructor and teaching assistants through assignment and grading tasks using the familiar JupyterHub environment. For details see: https://nbgrader.readthedocs.io/en/stable/user_guide/highlights.html#instructor-interface