Anyone who is associated with rail heritage knows that on the professional railways in New Zealand, train crews used hand held signalling lamps that could produce red, green and white light, for use when shunting a train. The older style lamps of this type worked with a mechanical rotating filter holder to move red and… Continue reading Red/green/white handheld signalling lamp
Month: October 2019
Rsync Backup System [4]: Linux File and Directory Security Using ACLs
As per our series on Rsync backups, we desire to use a different user from the one that owns the home directory in order to ensure they have only the permissions they need when logging in remotely. At this point whilst by default the backup user could access many things on the computer, there were… Continue reading Rsync Backup System [4]: Linux File and Directory Security Using ACLs
Arlec Plug In Heater Controls [2]
In my previous post in this series I described the PC900 2 hour plugin countdown timer which Bunnings have been selling for some time. The oddity of this product is that it is described on the packaging as having “adjustable switching increments”. This is a rather clumsy phrase more worthy of adjustable 24 hour timers… Continue reading Arlec Plug In Heater Controls [2]