So, should any developer know this? That is debatable. I've had very competent developers who had next to no clue about how DNS works. They could do their job just fine with that. Me? Personally, I'm not up to snuff with the finer points of SQL queries and all the joins that exists and when it makes sense to create an index, etc. Could I find out? Most likely, but I haven't had the need to recently.
The problem is, that you are mapping your knowlegde to "what people must know". I used to do that too, and I probably still do often enough. The DNS example above didn't come from nowhere: I had the case, and I was really thinking "how could such a competent person not know this", but then this person could probably enlighten me about dozens of things I don't know well enough.
It all comes down to what you define as "general knowgledge" for a developer should be and that is highly subjective.
TL;DR Hiring people is hard. Especially, technical people.
The bug doesn't happen in that context:
root@minimal:~# ssh root@othermachine "dd if=/dev/vg0/remote-lv" | dd of=/dev/xvdb1
root@hammerhead's password:
31457280+0 records in
31457280+0 records out
16106127360 bytes (16 GB) copied, 2156,62 s, 7,5 MB/s
31457280+0 records in
31457280+0 records out
16106127360 bytes (16 GB) copied, 2164.91 s, 7.4 MB/s
root@minimal:~# uname -a
Linux minimal 3.2.0-4-amd64 #1 SMP Debian 3.2.65-1+deb7u1 x86_64 GNU/Linux
Of course, the situation is not exactly the same in a virtualized environment.
Second, you could just take a stock webcam, attach it to an RPi, let it make a picture, let's say every 15 minutes and upload it to the desired FTP server. 100% scriptable.
Personally, I think this idea is ripe for abuse. Somebody is going to draw penises on the menu and it will be there on the site for all to see. Overthink your workflow instead of doing this.
Jet fuel is to gasoline what gasoline is to diesel. It burns very quickly which as you can imagine makes it useful for an engine of this type.
Jet fuel is actually so much closer to diesel (and heating oil) than you imagine. Now, I know nothing about jet engines, but I did know that. Mainly because I tend to remember "interesting but useless facts". Link to Wikipedia
Give me a factory and a team of engineers from the 1860s
Typo? 1960, I buy, but in 1860? Not so sure... The birth of the car is generally put at 1886.... The Wright Brothers did they first powered flight in 1903.
Do you suffer painful elimination? -- Don Knuth, "Structured Programming with Gotos"