Computer Documentation Wiki

actions_to_take_when_leaving_leiden_observatory

Anonymous (anonymous@undisclosed.example.com) — 2016-04-12T07:34:31+00:00

Actions to take when leaving Leiden Observatory or Institute Lorentz ---------- When your stay at Leiden Observatory or Lorentz Institute is at an end, it is time to think about what to do with the materials you have accumulated, both physically (cleaning out your office) and virtually (your files on disk).

aips

Anonymous (anonymous@undisclosed.example.com) — 2020-11-20T11:56:48+00:00

AIPS at Sterrewacht Leiden The introduction course to astronomical software contains a chapter on AIPS AIPS versions Our installation usually has the current development version of aips (31DECyy with yy the last two digets of the current year) as TST version, the stable release (last year's version) as

anonymous_ftp

Anonymous (anonymous@undisclosed.example.com) — 2021-12-07T16:19:11+00:00

Anonymous FTP Anonymous FTP has been disabled, please see here for an alternative. The anonymous ftp area of the Sterrewacht is available at [[. You login with username: ftp or username: anonymous and provide as password your email address. Anonymous users can only write in directories that are writable by everyone (

anti-spam_and_anti-virus_measures

Anonymous (anonymous@undisclosed.example.com) — 2014-05-09T11:43:52+00:00

Anti-spam and anti-virus measures ---------- DNS Blacklists When mail arrives at our mailserver, our first line of defense is sendmail's mechanism to consult various DNS blacklists. These are lists maintained on the internet containing the IP addresses of know spammers. This mechanism is quite successful in stopping a large percentage of all unwanted mail (see statistics), but it cannot recognize spam when sent from a new, unknown source, so it cannot be the only defense. We have supplemente…

astronomical_software

Anonymous (anonymous@undisclosed.example.com) — 2025-04-30T10:22:27+00:00

Astronomical software Here is a list of astronomical software installed on the system for general use. (This section should/will be expanded to contain linked pages with a description of the package.) * AIPS (classic) * AIPS++ / CASA * AMUSE * ASTROMATIC * CLOUDY *

casa

Anonymous (anonymous@undisclosed.example.com) — 2017-02-24T11:47:54+00:00

CASA Common Astronomy Software Applications, previously AIPS++. See also Versions Due to requirements of different projects, we usually have multiple versions of casa installed. Command casa will load the default version, usually the latest. Commands like

china

Anonymous (anonymous@undisclosed.example.com) — 2026-01-09T12:09:12+00:00

Remote access from countries that restrict internet access Since internet access is very limited from some countries (eg China) and VPN is often blocked there as well, you have a few options to circumvent the restrictions. These are all based on ssh tunnelling, because it seems the ssh protocol is usually not blocked. (but of course, if

computer_acquisitions

Anonymous (anonymous@undisclosed.example.com) — 2014-08-19T09:41:51+00:00

Computer acquisitions ---------- * New desktop * New laptop * Personal devices * Policy Computer acquisition

conda

Anonymous (anonymous@undisclosed.example.com) — 2026-02-23T15:02:50+00:00

Working with Anaconda/Miniconda What is Anaconda? Anaconda is a distribution platform and toolkit for running independent software environments, especially for python but it can be used for almost any software component. So if you need a specific version of python, or a specific version of some of its modules, this may be the place to go. Anaconda is a full environment, Miniconda is the minimal set to get started. Both will function the same once installed and configured

copier_as_scanner

Anonymous (anonymous@undisclosed.example.com) — 2024-04-03T09:56:48+00:00

Using the copy machines as scanner You can use the copy machines located near the far end of the GOB B West wing (BW3copier & BW4copier) as scanning devices to scan your documents to PDF and mail the results to your personal mailbox. Follow the steps below to perform this operation.

daily

Anonymous (anonymous@undisclosed.example.com) — 2015-05-18T14:43:58+00:00

Daily operations Here you can find information about daily operations. * Computer acquisitions * Email * Poster printing * Printing * Password expiration * Remote access * Wireless access

data_archive

Anonymous (anonymous@undisclosed.example.com) — 2023-01-23T11:26:08+00:00

Data Archive For all research projects the archival rules state that we need to keep your data accessible and archived for 10 years after you finish the project or PhD. This means that you need to inform the helpdek what data should be stored in the Sterrewacht Archive.

desktop

Anonymous (anonymous@undisclosed.example.com) — 2026-03-05T10:52:43+00:00

Your Desktop The Observatory has a standard Linux Workstation of which the configuration is updated regularly. The major aim for this Workstation is to provide you with ample computer resources on your desk for most of you daily scientific work. For extremely heavy computing we have an HPC cluster, special purpose science servers and a Bulk Storage environment.

dvd_writing

Anonymous (anonymous@undisclosed.example.com) — 2015-05-18T14:21:54+00:00

DVD-writing Graphical interfaces Various utilities are provided for writing CDs or DVDs. Perhaps the easiest method is the integrated support that various desktop file managers offer. When an empty cd or dvd is inserted, a window pops up asking you what you want to do, and one of the choices will offer a

easybuild_environment

Anonymous (anonymous@undisclosed.example.com) — 2021-02-08T16:37:26+00:00

Working with EasyBuild EasyBuild is a build and installation framework that facilitates management of (scientific) software. All GNU/Linux workstations and servers have a variety of softwares available through our EasyBuild environment. Because EasyBuild is a powerful framework that enables everybody to build and install complex softwares with ease, we encourage users to use it in their development workflows. Here we give a few tips should you decide to employ EasyBuild in your private softwar…

email

Anonymous (anonymous@undisclosed.example.com) — 2025-01-20T14:03:18+00:00

Email ---------- * Mail settings * Webmail * Mozilla Thunderbird * Other E-mail clients * Mail filtering using procmail * Mail forwarding * Implementation of the university mail forwarding policy STRW & LION * Anti-spam and anti-virus measures * work privacy and security (@Leiden University) * Vacation messages setup * Mail aliases * Sterrewacht * Instituut Lorentz * Mailman mailinglists Sterrewacht * Notes about the new Mailman version 3 * Umail forw…

eso_pipelines

Anonymous (anonymous@undisclosed.example.com) — 2025-04-11T13:54:47+00:00

ESO pipelines ESO offers pipeline software for their instruments (see ) However, installing this software directly on to the system, is usually not possible, since they don't support every version of Fedora or RedHat. We have two methods to make this software available to users:

external_disks

Anonymous (anonymous@undisclosed.example.com) — 2015-05-18T14:15:43+00:00

Removable media In current Linux versions, removable media are handled by HAL (hardware abstraction layer, not the Space Odyssey kind) and no longer through automount. Users of desktop environments like Gnome and KDE, should just be able to mount any type of removable media through their desktop (e.g. cdrom, dvd, usb stick, usb digital camera). In Gnome:

general_software

Anonymous (anonymous@undisclosed.example.com) — 2021-06-24T15:11:40+00:00

General Software Packages This page lists some software packages that can be made available everywhere, regardless of the domain (STRW, LION, IL) and operating system (Windows, Linux, Mac OS X). These pages also describe how the use remote access/home licensing.

generic

Anonymous (anonymous@undisclosed.example.com) — 2016-06-28T19:39:44+00:00

Generic Information * University Self Service * Wireless connectivity * Printing from laptops * Ordering Computer Hardware

gipsy

Anonymous (anonymous@undisclosed.example.com) — 2017-06-12T08:25:13+00:00

Gipsy The Groningen Image Processing System. Our introduction course has a chapter on Gipsy. See

gitlab_notes

Anonymous (anonymous@undisclosed.example.com) — 2022-08-09T12:02:16+00:00

Gitlab Notes Lorentz Institute runs a private instance of Gitlab accessible to all institute members available at regardless of their role within the Institute. You are strongly encouraged to use it to collaborate with your colleagues and fellow scientists anywhere in the world.

idl_astro

Anonymous (anonymous@undisclosed.example.com) — 2017-06-12T08:25:31+00:00

IDL Astro This is the Astro package running under IDL. Our introduction course has a chapter on IDL for astronomical work.

institute_lorentz

Anonymous (anonymous@undisclosed.example.com) — 2026-02-24T08:19:15+00:00

Lorentz Institute For Theoretical Physics News New UL policy on Automatic Mail ForwardingBeware of Phishing EmailsA phishing email is an email that looks like originating from a reputable institution and that usually contains a request to click on a link to confirm/modify etc.. one's credentials. In fact this link will

intro_to_unix

Anonymous (anonymous@undisclosed.example.com) — 2016-06-02T06:58:29+00:00

Introduction to UNIX and STRW environment * Intro Course

iraf

Anonymous (anonymous@undisclosed.example.com) — 2017-06-12T08:21:30+00:00

IRAF Local installation peculiarities Command iraf is available as well as the 'normal' method of calling cl directly. Another startup script is xiraf which starts up IRAF in a xgterm. Command shells ecl, ncl and vocl are directly callable as well. Apart from starting IRAF, these scripts also check for the existence of a

latest_news

Anonymous (anonymous@undisclosed.example.com) — 2025-11-19T10:04:06+00:00

latest news Fedora 43 announcement Texel windows remote desktop server, as partial replacement of university Citrix services New setup for running the ESO pipelines Virtual server migrations Sterrewacht (all done) Virtual server migrations Lorentz STRW webmail upgrade to Roundcube 1.6 Reserve meetingrooms GOB New UL policy about AUTOMATIC mail forwarding: STRW / LION Docking stations Using docking stations and STRW/LION Remote Desktop Services Overleaf Campus license Lorentz Institute …

leiden_institute_of_physics_lion

Anonymous (anonymous@undisclosed.example.com) — 2015-06-17T11:18:34+00:00

Leiden Institute of Physics Helpdesk ---------- General information * New students * Daily opreations * When you leave the University * Webmail * University Self Service * Wireless connectivity * Printing from laptops * For documentation on using Linux, see the Sterrewacht pages in this wiki LION computer network Most of the documentation can still be found in the

mail_settings

Anonymous (anonymous@undisclosed.example.com) — 2024-11-12T11:50:51+00:00

Mail settings Many mail programs are able to figure out the settings automatically. If not, consult this page to look for the settings you need Sterrewacht Incoming server: mail.strw.leidenuniv.nl (protocol: IMAP, port 993, connection security: SSL/TLS. Authentication method: Normal password)

manuals

Anonymous (anonymous@undisclosed.example.com) — 2022-04-03T18:50:01+00:00

* Webmail * Adobe CC license * Outlook 2007 with Exchange 2010 with Calendar and Contacts * Thunderbird and Exchange 2010 * How to access your Home and Group directories from outside with WinSCP * How to access your Home and Group directories from outside with AnyClient * How to access your computer from outside (Tunnelier) * How to access SAP Self Service and ROG forms and GROS (NUWD) * How to Print on the wireless network * How to Print with a Mac on the wireless network

matlab_on_cluster

Anonymous (anonymous@undisclosed.example.com) — 2021-06-24T07:19:30+00:00

Matlab on multi-processor machines The aim of this short guide is to get you started with using matlab in a multi-processor environment. The goal is to instruct matlab to use a `pool' of n processors rather than a single one to speed up calculations.

mesa

Anonymous (anonymous@undisclosed.example.com) — 2025-04-30T11:37:29+00:00

Modules for Experiments in Stellar Astrophysics (MESA) A note up front: this is not the only piece of software called “MESA”, and also not the most common one. With that out of the way, the MESA package is used in several courses and research projects.

midas

Anonymous (anonymous@undisclosed.example.com) — 2017-06-12T08:25:48+00:00

ESO-MIDAS Our introduction course has a chapter on MIDAS as well. See also

miriad

Anonymous (anonymous@undisclosed.example.com) — 2015-06-01T13:26:31+00:00

Miriad ATNF edition BIMA / CARMA edition See also *

mozilla_firefox

Anonymous (anonymous@undisclosed.example.com) — 2014-05-02T11:30:37+00:00

Mozilla firefox ---------- Mozilla Firefox is the stand-alone webbrowser derived from the Mozilla suite. If you don't need an integrated mail client, chat client, html editor and more, then consider using Firefox as your browser. Other advantages:

mozilla_thunderbird

Anonymous (anonymous@undisclosed.example.com) — 2024-09-20T07:56:37+00:00

Mozilla Thunderbird ---------- Mozilla Thunderbird is the stand-alone mail client derived from the Mozilla suite. If you don't need an integrated webbrowser, chat client, html editor and more, then consider using Thunderbird as your browser. Other advantages:

new_desktop

Anonymous (anonymous@undisclosed.example.com) — 2014-08-19T10:28:58+00:00

New desktop ---------- If you wish to order a new desktop you can send an email to bestellingen@strw.leidenuniv.nl Regarding the “Europeese aanbesteding” there is an policy for computer acquisition. More information about this policy can be found here :

new_laptop

Anonymous (anonymous@undisclosed.example.com) — 2021-09-28T13:52:12+00:00

New laptop ---------- If you wish to purchase a new laptop you can send an email to bestellingen@strw.leidenuniv.nl with your request. When you decide you want a new laptop you can send an email to bestellingen@strw.leidenuniv.nl. Please send in this email:

ordering_software

Anonymous (anonymous@undisclosed.example.com) — 2022-12-22T13:01:43+00:00

Ordering Software For your Laptop If you need additional software on your laptop and you need one of the standard campus licensed software packages you can drop by the computer group to obtain the software for that particular package. General packages that we have available:

ozonsecurityexercise

Anonymous (anonymous@undisclosed.example.com) — 2023-03-24T08:04:09+00:00

OZON Security Excercise THIS PAGE IS PART OF THE OZON Security Exercise. THIS MEANS THAT ANY INFORMATION PRESENTED HERE IS A TEST AND NOT A TRUE REPRESENTATION OF THE REAL WORLD. The Netherlands IT infrastructure is currently under attack and we also are experiencing hacking attacks due to a flood of published vulnerabilities in different packages. Below we describe actions taken to mitigate the effect of these attacks and vulnerabilities on our systems.

paracluster

Anonymous (anonymous@undisclosed.example.com) — 2022-04-04T06:49:33+00:00

OBSOLETE: Para Cluster * Torque implementation at Leiden Observatory * Current user groups * Things to know * Example torque script * Usage rules and requests for access Latest News The para cluster is getting quite old, both in terms of hardware and in terms of software. It has been retired in spring 2022. Introduction Over the past few years the speed of CPU's has not increased according to Moore's law. In fact we are at a hold on about 3

password_expiration

Anonymous (anonymous@undisclosed.example.com) — 2017-11-27T10:33:46+00:00

Password expiration ---------- Password aging is in place with the LDAP password database for both Linux and Windows. For the sake of security, it is recommended to change important passwords on a regular basis. In our system, the password expiration time is set for 1 year. Ten days before your password expires, you will begin getting reminders when you log in, telling you to change your password within x days. This will give you some time to think about a new password which is not too hard t…

personal_devices

Anonymous (anonymous@undisclosed.example.com) — 2014-08-21T10:58:43+00:00

Personal devices ---------- If you wish to order any personal devices like external hard drives or tablets, can this be done the same way as the rest of computer acquisitions. You can send an email to bestellingen@strw.leidenuniv.nl. For expensive equipment and equipment that easly can be taken with you when you leave the University like external harddrives or tablets you need to sign an loan form. This form will be send to you when your order has arrived at the Sterrenwacht. You have to bri…

personal_web_pages

Anonymous (anonymous@undisclosed.example.com) — 2018-01-05T15:15:51+00:00

Personal WEB pages All LINUX server based groups, Observatory and Institute Lorentz, have inside their personal home directory a directory name public_html, which is the top level directory of your personal WEBstack. Your personal webstack has a URL

php

Anonymous (anonymous@undisclosed.example.com) — 2018-01-05T15:20:18+00:00

PHP The WEB server can server server side executed code in the PHP language. This powerful language allows you to create interactive WEB pages. Learn to program in PHP

policy_computer_acquisition

Anonymous (anonymous@undisclosed.example.com) — 2025-08-20T12:46:44+00:00

Policy Computer acquisition ---------- When computer equipment is bought using university controlled funds (such as EU-funds) one has to abide by the rules of the “Europese Aanbesteding”. This means that desktops, laptops, screens, servers, cluster machines and storage devices have to be acquired from the preferred vendors in the associated EU-contracts. Only if a specific machine cannot be provided by one of these preferred vendors (specifications in the form of functional descriptions) it i…

policy_on_old_data

Anonymous (anonymous@undisclosed.example.com) — 2014-06-27T11:14:10+00:00

Policy on old data ---------- From time to time, when old computers get retired, or reconfigured for another task or moved to someone else's desk, we find data on the disk which belongs to someone who is no longer here. If we know where to contact the previous owner, we will do that and discuss what to do with the data. if not, the disk will be removed from the machine, labeled with computer name, disk name and list of users, and put in (offline) storage. Data will be kept there for a couple…

poster_printing

Anonymous (anonymous@undisclosed.example.com) — 2026-01-13T14:16:42+00:00

Poster printing ---------- Local Printing Posters with a maximum width of 85 cm (A0 paper width) can now be printed here at the Observatory. The best way to do this is to create a PDF file from your layout program. Powerpoint is not very good at converting A4 to A0 size, so either create your poster at custum size 84x120cm or at standard A4 size. In the latter case use special settings for PDF conversion (2400 dpi, no compression) to prepare a scalable PDF file.

printing

Anonymous (anonymous@undisclosed.example.com) — 2024-12-17T14:22:41+00:00

Printing ---------- Printing from laptops There is a separate page about the printer setup on personal laptops. Queuing your print The command 'printers' should give you a list of printers available to people at the observatory, and the location of them. After selecting the closest one to you (or one a little further in case you missed your workout) you can print (postscript!) files with the command

procmail

Anonymous (anonymous@undisclosed.example.com) — 2023-07-28T13:24:49+00:00

It is possible, and allowed, to forward (most of) your mail to an external mail server. However, the university has put in plkace a mail forwarding policy about mail marked as confidential, see here for the STRW & LION implementation of that policy. Mail filtering and forwarding using procmail

procmailrc_template

Anonymous (anonymous@undisclosed.example.com) — 2016-05-10T08:20:26+00:00

#*** Special comments for SfinxUpdate: #SfinxFileName: procmailrc-spamassassin #UserFileName: .procmailrc # %SFINX_RELATED% forward # %SFINX_NEEDS_EDIT% Default settings is to put spam in a folder named "junk". If you want procmail/spamassassin to put spam in another folder, edit .procmailrc . #*** End of special comments for SfinxUpdate # # SET VARIABLES ############################################################################## # Internal Variables SHELL=/bin/sh #Shell …

remote_access

Anonymous (anonymous@undisclosed.example.com) — 2026-01-09T12:30:30+00:00

Remote access ---------- * VPN * SSH terminal access * SSH from Linux or MAC * SSH from Windows * SSH Tips & tricks (tunnels, proxy) * SSH from within VScode * Graphical access (remote desktop) * VNC to Linux desktops from Linux, MAC or Windows * X2go to Linux desktops from Linux, MAC or Windows * Remote Desptop Protocol (RDP) * Details for * Laptop remote access * Institute Lorentz * Sterrewacht Virtual Desktop Server (vdesk) * Running licensed …

roundcube16

Anonymous (anonymous@undisclosed.example.com) — 2024-09-18T07:14:09+00:00

Roundcube 1.6 In September 2024, we are switching over to the new Roundcube version 1.6. Here is a summary of important changes. Two-factor authentication integrated The new Roundcube has two-factor authentication integrated. So, this avoids the double login page we used to have (one page using the two-factor login on the IDP server, followed by Roundcubes own login form that didn't know the user was already logged in).

rules_of_behavior

Anonymous (anonymous@undisclosed.example.com) — 2014-08-21T11:50:27+00:00

Informatiebeveiligingsbeleid Universiteit Leiden ---------- Regeling Acceptabel gebruik Informatievoorzieningen Versie 1.0 - 18 augustus 2004 ---------- Het College van Bestuur besluit, Inleiding Deze regeling beschrijft de gedragregels voor individuele gebruikers van Informatievoorzieningen van de Universiteit Leiden. Deze regeling maakt onderdeel uit van het informatiebeveiligingsbeleid en is van toepassing op iedereen die gebruik maakt van Informatievoorzieningen aangeboden door (een …

scanner

Anonymous (anonymous@undisclosed.example.com) — 2015-05-26T12:10:47+00:00

Scanning with HL511a scanner The Windows PC in room Huygens 511a has a flatbed scanner attached. It can be used to scan document to a file, e.g. a PDF file. * Login to the Windows environment using your STERREWACHT username and password. * Put the original onto the flatbed scanner

slurm_tutorial

Anonymous (anonymous@undisclosed.example.com) — 2019-01-16T08:35:07+00:00

Slurm: A quick start tutorial Slurm is a resource manager and job scheduler. Users can submit jobs (i.e. scripts containing execution instructions) to slurm so that it can schedule their execution and allocate the appropriate resources (CPU, RAM, etc..) on the basis of a user's preferences or the limits imposed by the system administrators. The advantages of using slurm on a computational cluster are multiple. For an overview of them please read

software_introductions

Anonymous (anonymous@undisclosed.example.com) — 2025-03-10T09:20:14+00:00

Software Introductions ---------- * Intro to UNIX * Fedora 41 the Linux version installed on the desktops * Linux desktop environment * Linux software menu * Linux software - by category * Sfinx login environment * Mozilla Firefox * Mozilla Thunderbird * Software packages * Environment modules * Compilers * Leiden business Letter format LaTeX

ssh

Anonymous (anonymous@undisclosed.example.com) — 2026-01-14T11:16:43+00:00

SSH Sterrewacht Most of the desktop machine at the STRW can be accessed through the ssh protocol. So when you know your machine name, use that (including the strw.leidenuniv.nl domain) to access that machine directly. If you do not have a personal machine you can use the

start

Anonymous (anonymous@undisclosed.example.com) — 2026-01-29T10:45:26+00:00

Latest news (latest update: 2025-11-20)Latest Problems Reported by Leiden University ISSC ---------- Working from home Here are some useful tips for working from home: Remote access SSH,VNC,X2GO,RDP Videoconferencing Remote teaching Computer Documentation Wiki If you have a problem with your computer, your network connection, software wishes, license usage etc, please file the problem at

sterrewacht_strw

Anonymous (anonymous@undisclosed.example.com) — 2025-09-16T10:22:21+00:00

Sterrewacht Leiden / Leiden Observatory **THINK before you click**, beware of phishing emails! A phishing email is an email that looks like originating from a reputable institution and that usually contains a request to click on a link to confirm/modify etc.. one's credentials. In fact this link will bring you to a malicious website that will steel your credentials when you naively insert them.

strw_storage_environment

Anonymous (anonymous@undisclosed.example.com) — 2015-08-18T07:35:48+00:00

STRW Storage Environment ---------- We are proud to announce the availability of a new storage environment based on the Dell PowerVault Fluid Filesystem hardware. The storage unit can potentially grow to multi petabyte scales, but is currently only 125TB large. In order to expand such a system we have to change our financial mechanism. Large disk space it not a free commodity. If you look at external companies, they charge you in the order of Euro 0.06/

umail_forwarding

Anonymous (anonymous@undisclosed.example.com) — 2026-02-09T14:23:21+00:00

Forwarding UMail As of January 2026, UMail doesn't allow any forwarding any more, not even to domains like strw, physics and lorentz (and probably not even for those people who have applied for an exception). So all of this information is obsolete.

vacation_messages_setup

Anonymous (anonymous@undisclosed.example.com) — 2022-08-16T08:00:03+00:00

Vacation messages setup | E-mail auto reply You can setup a “vacation message” while you are away from your email in several ways. All this makes use of the Linux specific procmail utiltity, which for all STRW and IL accounts has been setup for you already (see last section below).

videoconf

Anonymous (anonymous@undisclosed.example.com) — 2018-02-06T10:42:04+00:00

Video Conferencing The Observatory houses three video conferencing systems of which two are available to all Sterrewacht personel and one is specific for the METIS project. Public Video Conferencing Units These units can be used freely by all Sterrewachters, provided a reservation has been made through the Observatory secretariat (Oort 465).

virtual_observatory

Anonymous (anonymous@undisclosed.example.com) — 2017-06-12T08:23:59+00:00

Virtual Observatory The Virtual Observatory (VO) is not a single piece of software, but a collection of online services, data formats, protocols and software to implement them. See . Our in troduction course also has a chapter about the Virtual Observatory.

vnc

Anonymous (anonymous@undisclosed.example.com) — 2025-10-07T12:19:33+00:00

Virtual Network Computing Virtual Network Computing (VNC) is a remote display system which allows you to view a computing 'desktop' environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. This package contains a client which will allow you to connect to other desktops running a VNC server.

vpn

Anonymous (anonymous@undisclosed.example.com) — 2025-10-07T08:46:58+00:00

Remote access using VPN Sterrewacht There is a new OpenVPN server that allows you to connect your personal computer/device to the internet as if it were part of the institute computer network. The server is a standalone server with the sole purpose of providing VPN connections, and to which you can connect using an OpenVPN client.

web_pages_options

Anonymous (anonymous@undisclosed.example.com) — 2015-05-26T13:45:42+00:00

Password protected web directories and other options It is possible to restrict access to a part of your website. Restrictions could take the form of a password prompt, or access granted only from certain IP addresses. The .htaccess mechanism The Apache webserver has a mechanism to set options for a part of a website, by putting a file named

webmail

Anonymous (anonymous@undisclosed.example.com) — 2024-08-05T14:19:54+00:00

webmail A webmail interface is available to all users, both locally, and from anywhere in the world. * Sterrewacht Webmail * Some notes about the new Roundcube 1.6 * Instituut Lorentz Webmail * LION Webmail The websites of these programs, and their built-in help pages, contain all the documentation you will probably ever need.

when_you_are_new_at_the_lorentz_institute

Anonymous (anonymous@undisclosed.example.com) — 2026-03-30T10:39:23+00:00

When you are new at the Lorentz Institute New arrivals workflow New members of the Lorentz Institute (IL) are expected to observe the following steps to gain access to the IT facilities provided by the istitute * Notify the IL secretariat located in Oort 251 (

winclient

Anonymous (anonymous@undisclosed.example.com) — 2015-06-01T14:07:13+00:00

WinClient From time to time, you may be faced with a document or website, which doesn't know yet that it is a good thing to work cross-platform, and you need access to a Windows system. For this purpose, we have set up a Windows terminal server. From our Linux desktops, access to this server is possible using the command

working_with_python

Anonymous (anonymous@undisclosed.example.com) — 2025-04-07T15:07:52+00:00

Working with Python Python is available on all Sterrewacht and Lorentz Institute GNU/Linux workstations. In most cases, both python v2 and python v3 are available. Please note that python v2 has reached its end-of-life on 01-01-2020 and therefore is no longer actively supported.