Monthly Archives: February 2015

Dynamic image generation for login screens

Having decided to use LightDM as the default display manager for EL7, the next problem was to control the appearance of the greeter or login screen. On SL6 we do this using custom KDM themes distributed by RPM. For EL7 … Continue reading

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grub2 – sanity prevails

Back in April 2014 I wrote a new LCFG component to configure the grub2 bootloader. At the time I blogged about the problems with restricting edit access for menu items. The issue was that once you had a list of … Continue reading

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Local firefox configuration

For various reasons we need to apply some local configuration to firefox on DICE machines. In particular we set the negotiate_auth options so that we get single-sign-on to our various Cosign protected web services. Recent testing of our SL7 desktop … Continue reading

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jabber GSSAPI SASL problems

A number of Computing Officers in Informatics are now using SL7 for their standard desktop. This is good because it means various bugs are being flushed out of the woodwork. A recent issue we have found is that the pidgin … Continue reading

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Trusting a local CA

For some of our services we use SSL certificates which are signed using the local university CA. On Redhat systems to get applications such as firefox to trust this CA we have always had to hackily patch and rebuild the … Continue reading

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Describing features of a system

Recently I have added a new concept to the sysinfo component which allows admins to describe general features of a system. These are simple arbitrary flags which indicate the presence (or possibly lack) of some feature on a system. The … Continue reading

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