ISP Wiki - en:doku:computerservices

acl

Anonymous (anonymous@undisclosed.example.com) — 2019-04-12T14:55:47+00:00

ACLs under NFS4 On the Linux desktop computers, home directories, workgroup directories and other network drives are connected with NFS. The now used version NFS V4 uses Access Control Lists (ACLs) to control the access rights, which allow a very precise definition of the rights. For example, a file can be assigned with different rights for several users and groups, while regular access rights only allow the assignment of rights for one user, one group and the

backup

Anonymous (anonymous@undisclosed.example.com) — 2019-08-29T12:49:13+00:00

Backup and recovery The Rechnerbetriebsgruppe runs a data backup services for all user data. The data will be backed up on working days every night. If important data gets lost, it sometimes can be recovered. The recovery of the data will take some time.

browser

Anonymous (anonymous@undisclosed.example.com) — 2019-01-24T09:51:33+00:00

available browsers On the pool-computer are both graphical and text-based browsers available. The graphical browsers are in particular: * Iceweasel (Iceweasel Browser Stable-Release) * Epiphany (Epiphany Browser Stable-Release), * Konqueror (Konqueror Browser Stable-Release),

datasystem

Anonymous (anonymous@undisclosed.example.com) — 2020-10-20T07:24:42+00:00

data system The data system is builded in parts with the so-called auto mounter during the request time. The directories which are hooked up in the basic data system by the auto mounter are only available after some seconds. These may lead to the confusing error message

data_sharing

Anonymous (anonymous@undisclosed.example.com) — 2025-01-13T11:43:02+00:00

data sharing right management in generell Unix rights are in general set up with the chomd. You can display them with ls -la . Thereby the format of the entries is the following order: * First the type of the object is specified by a symbol. The

directory_cleaning

Anonymous (anonymous@undisclosed.example.com) — 2019-04-12T12:46:15+00:00

clear up $HOME All users have a limited memory space. There is a moment at which this magical boarder is reached and you have to clear up your space. If you aren't able anymore to log in on the terminals you can use the ssh-connection on clienssh1.rbg.informatik.tu-darmstadt.de or clientssh2.rbg.informatik.tu-darmstadt.de - there is the login still possible (as long as the account is not blocked).

directory_reseting

Anonymous (anonymous@undisclosed.example.com) — 2019-04-12T11:52:20+00:00

restoring the home directory In the case that the interface or the programs don't work the way as wished, there is the final way to reset your own folder. This will delete all data and should therefor be the last solution. First some notes: * If it's only Sonne applications that don't work:

laptops

Anonymous (anonymous@undisclosed.example.com) — 2019-06-02T12:39:22+00:00

access to the internet via the pool computer using your laptop To have access to the internet with your own laptop via the pool computer, you have to connect your laptop with a ethernet cable (which you have to bring yourself) with the ethernet jack next to the computer.

laptop_with_computer

Anonymous (anonymous@undisclosed.example.com) — 2019-06-24T14:58:04+00:00

Connecting to the internet with your laptop To access the internet with your laptop via the pool computer connect your laptop with an ethernet wire your brought and the LAN socket. To make this work without problems the wire has to be in the laptop before you start the laptop.

news

Anonymous (anonymous@undisclosed.example.com) — 2018-12-06T11:00:38+00:00

News To stay update on the services of the ISP-group or the computer science in generell, you can take a look on these pages: * The Webseite of computer science * The ISP-groups Blog (mostly in German) * The ISP Twitter Account (mostly in German) * The Moodle-Webseite of the computer science

password

Anonymous (anonymous@undisclosed.example.com) — 2019-08-29T12:52:30+00:00

How can the RBG/ISP password be changed? To change the RBG/IPS-password you should use the command passwd in the command line. The command requires the entering so nobody can change the password of another user if the other user is e.g. at the printer or something like that.

poolcomputer

Anonymous (anonymous@undisclosed.example.com) — 2020-09-24T16:28:48+00:00

The pool computer The pool computers are a hard-drive-less computer which gets the operating system from a file-server. * Hardware: * Intel Core2Duo E6700 @ 3.20GHz with 2 kernel * Einem Zotac G-Force 9300-ITX mainboard * 4GB DDr3 Ram *

postgresql

Anonymous (anonymous@undisclosed.example.com) — 2019-07-10T14:19:13+00:00

PostgreSQL Since may 2016 there is the database software PostgreSQL installed on every pool computer. But there is no preset database instance to keep the pool computer as thin as possible and to make the right management easier. Instead of that every user can set up and use their database instance. For that you should create the instance in an extra directory beneath the /home:

programm

Anonymous (anonymous@undisclosed.example.com) — 2019-07-10T14:27:28+00:00

Java Java is installed in various versions. They can be found under /usr/bin/java. As default we use Java 1.6.0_18 at the moment. Eclipse The Java-IDE Eclipse can be started using the command eclipse-3.2, eclipse-3.3 or eclipse-3.5.2 The reason for that is that there is a software ECLiPSe Constraint Logic Programming System with the same name.

quota

Anonymous (anonymous@undisclosed.example.com) — 2025-07-09T08:57:59+00:00

Quota In order to reconcile the large number of students and the limited space of the hard disks, there is a space restriction for users with RBG/ISP accounts called quota. This is currently 3 Gbyte. triggers Most of the time you will be confronted with the quota if a program reacts

scm

Anonymous (anonymous@undisclosed.example.com) — 2019-02-14T11:44:11+00:00

create a project To create a project it's important to know, that after the first-time login there will be a project created which has the identification name (in OpenProject language: ID), the TU-ID and as the „name“ the surname and last name which the CAS transmits.

shell

Anonymous (anonymous@undisclosed.example.com) — 2019-04-11T17:04:00+00:00

Login Shell For every student who logs in on the pool computer or via clientssh the login shell will be set to bash. Now there are a lot of alternatives especially for unix/linux and they can be used in three ways: * direct call - onetime, e.g. for testing *

ssh

Anonymous (anonymous@undisclosed.example.com) — 2025-03-27T12:31:38+00:00

SSH SSH (Secure Shell) is a protocol, quite similar to Telnet, which allows you to open the command line on a distant computer. SSH is always encrypted - during the establishment of the connection and also during the data transfer. On the destination computer there is a SSH-server and on your own computer there is a SSH-client running. Unix operating systems like Solaris and Linux have SSH as a default. If you have a Windows computer you can use e.g. Cygwin (

student_website

Anonymous (anonymous@undisclosed.example.com) — 2025-01-28T14:41:41+00:00

student homepage Student with a RBG/ISP account have the opportunity to create a homepage in their home-directory which can be made available for the public. Once set up you can find your own student homepage under www.student.informatik.tu-darmstadt.de/~accountname/ or You have to create a directory with the name

tucard

Anonymous (anonymous@undisclosed.example.com) — 2019-07-16T10:23:27+00:00

TUD-Athene Card print with the Athene card The RBG/ISP is planing a new printing system (https://print.informatik.tu-darmstadt.de), in order to meet the new requirement. Therefore we are setting up a test system which contains of a cardreader, the software PaperCut and the left PH printer in S2|02 C005 (the bigger PC poolroom).

vnc

Anonymous (anonymous@undisclosed.example.com) — 2020-03-24T16:01:14+00:00

VNC via clientssh computer VNC is a protocol and a program to show a network on the desktop. In other words: you are able to see the graphical interface of the pool computer on your computer at home and you will be able to work remote from home. In this way you will be able to work with Matlab, Eclipse etc.

windowmanager

Anonymous (anonymous@undisclosed.example.com) — 2019-01-24T11:51:52+00:00

windowmanager If you're sitting in front of a pool-computer you will see the login-manager first. You have to use the login-manager to log in the computer. You can also set the environment after logging in, i.e. you can select the window manager or the session. This is possible via the menu item

wlan-vpn

Anonymous (anonymous@undisclosed.example.com) — 2018-12-06T13:03:11+00:00

WLAN and VPN VPN Please remember: The RBG/ISP is not in duty for problems with the Cisco VPN client! Please contact the HRZ user support. You can also find them in the old mainbuilding S1|03 - 020. Sometimes it's also helpful to take a look FAQ (German), where you can find new tips.