Category Archives: Local IT systems

Sys-admin news

New package signing key

A new key (3294FB03) has been generated to sign all Lab packages (RPMs and .debs). This has been installed on most Lab managed machines. Private machines which use the Lab repositories will need to register the new key.

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World IPv6 day – 2011/06/08 – possible network service problems

On world IPv6 day there is a possibility of disruption of network services due to machine with dual stack not working correctly. Although we will be making small changes, most of the changes are outwith our control.

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svn services changes

As mentioned in centos-5-machines-upgrading-to-5-6 CentOS machines have upgraded. They now run svn 1.6.11, so the svn-1-6-6-serv service is being withdrawn.

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CentOS 5 machines upgrading to 5.6

CentOS 5 machines (mostly servers rather than user workstations) are automatically upgrading to 5.6. It should be mostly transparent, but the mailer (exim) has a security fix, so the old config file causes email to fail, including email saying that … Continue reading

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WordPress upgraded

The old WordPress software used for these pages has been upgraded. The theme has changed, but other things should be much the same.

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Network outages and consequences

As of about the 11th of March, we have been having a number of problems with servers crashing, machines misbehaving, network dropouts, things going slowly, etc.¬†We believe this to be due to some sort of local networking problem with the … Continue reading

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Unix groups now also available in AD

All Unix groups are now also maintained as a set of Security Groups in the Active Directory. The membership is controlled from the Unix groups and additions and deletions to maintain the groups in synchronisation are performed hourly during the … Continue reading

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slogin-serv move to NFS sec=krb5

Any users of the “slogin-serv” service should be aware that changes are to be made which may require them to run “kinit” to access their home directory.

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Web server changes

Two small changes have been made to the Lab web server that may break some existing web pages, in particular those using other character encodings than UTF-8. The first is intended to improve rendering of Lab pages in Internet Explorer … Continue reading

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Network flood

A traffic flood from a research group machine caused some network performance problems between sometime in the small hours of Thursday 2nd December and about 09:40 when the source was identified and disconnected. Our use of VLANs to separate traffic … Continue reading

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