Category Archives: Local IT systems

Sys-admin news

Unix group cleanup

On departmental Linux systems, many Unix groups have been added locally, to facilitate groups of users jointly editing files. Use the shell command “id” to see which groups you are a member of. To avoid malfunctions, we now need to … Continue reading

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CentOS 5.7 released – kernel lock bug fixed

Although not yet announced on the CentOS web site, CentOS 5.7 has been released, which includes a new kernel which fixes the bug which caused the machine to OOPS if an NFS file lock was attempted. As such, there will … Continue reading

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Wireless network replacement – phase 2 complete

Phase 2 of the wireless network replacement is now complete, adding a number of mid-corridor access points. No further expansion is currently planned. Filling in any remaining dead spots should be technically straightforward, but will incur an additional cost.

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Phone outage Thursday 28th July

The Computing Service send their apologies for the telephone system outage this morning. A small and fairly routine reconfiguration was made to the West Cambridge routers during this morning’s CUDN vulnerable period, ironically with the ultimate goal of improving network … Continue reading

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Wireless network replacement – phase 1 complete

The initial phase of the replacement wireless network installation is now complete. All of the old access points have been decommissioned, and 24 Aruba access points have been installed. We now intend to assess the coverage before deciding whether to … Continue reading

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Password requirements change

Passwords created or changed from now onwards will need to be of higher complexity than was permitted previously.  Details of the requirements can be found at http://www.cl.cam.ac.uk/local/sys/access/kerberos/.  Existing passwords will continue to work as normal – you only need to be aware … Continue reading

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Wireless network replacement

On Monday and Tuesday of next week (18th/19th July) the long awaited upgrade of the wireless network in the building will take place. There will be disruption to wireless access as old access points are replaced with new, but I … Continue reading

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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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