Local System Information
This page offers pointers to detail of how to use lab systems, how to get help, and so on.
Getting help and introductory documents
- An introduction to computing facilities is an on-line copy of the booklet new users are given.
- The Frequently Asked Questions list.
- The local system administration pages A to Z list.
- Web server information including how to export personal web pages files to the WWW and restrict access to them using .htaccess files and Raven passwords.
- Information for, and about, new arrivals at the Computer Lab. A selection of information, both technical and general, for new arrivals at the Computer Laboratory. This information is intended for everyone, visitors and longer-term residents. There is also information for the host of a visitor.
- Information for people leaving the Computer Lab, or moving into the Writing up/Hot Desk area.
- Equipment allocation, replacement and support
- Choice of Operating System on Lab managed machines
- For users of Unix systems. Redhat (Fedora and CentOS) and Ubuntu Linux. General information, software installation, configuration, applications.
- For users of Microsoft Windows systems. General information, access, applications.
- For users of private Macintosh OS/X systems Local configuration and integration information.
- Applications software, including MATLAB and Unix tools.
- Printing from Unix or Windows systems.
- Mail in the Computer Laboratory gives broad coverage of the facilities available.
Communications and the network
- Request a network connection.
- The Computer Lab network. An overview of the lab networks, both physical and wireless.
- The means of access to Computer Lab Systems, and other security related issues.
- Using the secure shell ssh to connect to the Laboratory.
- The one-time password system, that allows safe connection to lab unix systems in an insecure environment.
- Information about the Time Sharing Systems.
- Information about the File server and other file spaces.
- Disc usage and quota report (requires Raven).
- Users can boot a machine if it's off.
- For users of the Publicly-accessible scanners.
- For users of the Public CD/DVD writing machines.
- Specialist services such as SPSS, Adobe CS5 running under Windows.
- Public Windows Terminal Server machines.
- Video Conferencing Facilities
- The University High Performance Computing Service (HPCS)provides a means of running a number of parallel jobs on potentially large amounts of data. As such it is recommended as an alternative to the Computer Lab Condor facility.
- Sys-admin news
18 Jul 2016
The new Ubuntu 16.04
slogin-servservices do not accept the legacy ssh-dss (DSA) public key algorithm.
Any users having problems with their user ssh keys should try connecting to
-vswitch to check which key is used.
If it is
.dsa, please generate a new key and add it to
.ssh/authorized_keys, check that it works on
slogin-serv, then remove the old .dsa key and its
Remember never to copy the private key – it should only ever remain where it is generated.
7 Jul 2016
Subsequent to the move of slogin-serv to Ubuntu 14.04, another server has been added, which runs Ubuntu 16.04, accessible as slogin-new.cl.cam.ac.uk, which has been in service for a while now without any reported problems. It is now being added to the slogin-serv.cl.cam.ac.uk pool, so users may get Ubuntu 14.04 or 16.04. The hope is that it should not matter, and when we are confident that 16.04 is suitable, the pool will move to being just 16.04.
If you find something which requires 14.04, please connect to slogin-old.cl.cam.ac.uk and email the details to sys-admin
22 May 2016
The service name ‘
slogin-new.cl.cam.ac.uk‘ is used for the newest slogin pilot or service for the department (see Time Sharing Syetsms).
A new system is in development, so anyone wanting to use the previous ‘new’ server sandy should use
slogin-serv.cl.cam.ac.uk(using ssh user keys) or
sandy(using Kereberos). TGT server users should check their configuration files.
25 Jun 2015
The latest version of TeXLive is now available on the filer in /usr/groups/texlive.
Using the standard TeXLive naming convention, it is in the directory 2015. (more...)
28 May 2015
Our Xen system was disrupted last night. It is believed to be mostly fixed, but users should check their systems.
A rogue process caused problems with the Lab routing, which caused the filer to be inaccessible, causing some domUs to deem their file systems broken. It is thought that most effected systems have been restarted, but there may still be problems which need fixing. Please email sys-admin if any help is needed.