Author Archives: pb22

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 … Continue reading

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DNS resolvers now validating

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

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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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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 They now run svn 1.6.11, so the svn-1-6-6-serv service is being withdrawn.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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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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