Computer Laboratory

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

Administrative matters

Workstation provision

Systems software

Communications and the network

Facilities

If you spot things missing from this page and its sub-pages, please notify sys-admin@cl.cam.ac.uk.

[rss feed]Sys-admin news

17 Apr 2013

Purge of legacy automount information

It is believed that the last systems using the old “indirect” autofs LDAP tables have been shut down or moved to use “direct” filer mounts, so the information is no longer included in the LDAP data. If anyone observes failure of the automount system (rather than missing krb5 tickets) please report the machine and the directory to sys-admin.

24 Jul 2012

Xen Server problems – please report anomalies

We have had a number of problems with one of our Xen pools. If any VMs appear to be behaving oddly, please contact sys-admin. A dom0 (actual machine which hosts VMs) had problems, so was taken out of service and replaced with a hot-spare. One VM (only!) appears to have problems running on the dom0, but there may be others lurking.

24 Jul 2012

CentOS5 (Linux server) network service problems.

A Redhat package problem caused CentOS 5 machines (Linux Servers) to loose access to certain network services. One of our two mail servers may have rejected email between 04:15 and 04:30, when the problem was spotted and the failing MTA was taken out of service. (more...)

26 May 2012

DNS resolvers now validating

The CL DNS resolvers have DNSSEC validation enabled. Please report any DNS problems to sys-admin.

8 Feb 2012

Remote backups resumed

The regular remote backups that were suspended on 30th January have now resumed. In particular home directories are now up to date on the remote server and should continue to be backed up hourly. (more...)