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Author Archives: Dave

Sound Shock Wave Approaching

Ok, it’s not the newest of news, but I only just saw this for the first time this morning. It appears to me the eruption cloud itself is even faster than sound as you can see the shock wave overtake it early in the eruption as the cloud rises. Easy maths challenge for the partners: How […]

Posted byDave2016/06/072016/06/07Posted ingeneralTags: shock, sound, video, volcano1 Comment on Sound Shock Wave Approaching

“Rihanna couldn’t sing to save her life”

Rihanna on stage

Right or wrong, we’re all entitled to our own opinions.

Posted byDave2016/05/072016/05/07Posted ingeneralLeave a comment on “Rihanna couldn’t sing to save her life”

Marketing vs Piracy

“Why is it ‘marketing‘ when a company helps itself to my information against my will and ‘piracy‘ or ‘industrial espionage‘ if I helped myself to THEIR information against their will ?”

Posted byDave2016/05/07Posted ingeneralLeave a comment on Marketing vs Piracy

Roads and Maritime Services—Online Renewals (Privacy)

Privacy statement as presented to me on 2016-04-26 to register a motor vehicle online.

Posted byDave2016/04/26Posted ingeneralLeave a comment on Roads and Maritime Services—Online Renewals (Privacy)

Roads and Maritime Services—Online Renewals (T&C)

Terms and Conditions as presented to me on 2016-04-26 to register a motor vehicle online.

Posted byDave2016/04/262016/04/26Posted inonline policiesTags: motor vehicle, nsw government, online, registration, rmsLeave a comment on Roads and Maritime Services—Online Renewals (T&C)

using variables on the command line

I find I’m always repeating certain command lines with subtle changes. If the changes can be predicted, why not use a variable instead? Here’s how:

Posted byDave2016/04/26Posted inlinux, tipsTags: bash, linux, osx, terminal, ubuntu, variableLeave a comment on using variables on the command line

SSH key pairs and getting it onto the server

I have to go digging this one up every time I need it. I just can’t remember what to type, so here it is plain and simple.

Posted byDave2016/04/16Posted inlinuxTags: key pair, private key, public key, ssh, ssh keysLeave a comment on SSH key pairs and getting it onto the server

How it’s made: Aluminium Can

The humble Aluminium (aka Aluminum) can. How it’s made, and other stuff you just didn’t know about it.

Posted byDave2016/03/29Posted inHow it's madeTags: educational, engineering, manufacturingLeave a comment on How it’s made: Aluminium Can

new lines in sed on mac

I had a file that had a single line of output that needed a newline added for readability. I do this in Ubuntu regularly, but when I tried it on the mac I just couldn’t get it right. It seems it’s broken and this was how to get around it.

Posted byDave2016/03/29Posted inosxLeave a comment on new lines in sed on mac

Fun with Flags

I am a fan of TED presentations especially when they’re well presented like this one. I’m sure that Sheldon would even get a kick out of this one and possibly learn a thing or two.

Posted byDave2016/03/282016/03/29Posted inTEDTags: educational, flag, radio, roman marsLeave a comment on Fun with Flags

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