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Hacker Public Radio

Your ideas, projects, opinions - podcasted.

New episodes Monday through Friday.

Welcome to HPR the Community Podcast Network

We started producing shows as Today with a Techie 10 years, 9 months, 22 days ago. Our shows are produced by listeners like you and can be on any topic that "are of interest to Hackers". If you listen to HPR then please consider contributing one show a year. If you record your show now it could be released in 16 days.

Latest Shows

hpr2082 :: Basic Audio Production - Equalization

The basics of one of the most fundamental audio production techniques

Hosted by Nacho Jordi on 2016-07-26 and released under a CC-BY-SA license.
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The bread and butter of open source audio production:

hpr2081 :: Fixing my daughter's laptop

My daughter broke the headphone jack in her laptop. I tried to get the remains out

Hosted by Dave Morriss on 2016-07-25 and released under a CC-BY-SA license.
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Fixing my daughter’s laptop

My daughter is a student at university and uses her laptop with a headset most of the time. She shares a flat with a friend and they are both studying, so they don’t want to annoy each other with noise.

The headset my daughter uses has a very long cable and earlier this year she tripped over it. The microphone jack was OK, but the headphone jack snapped off at the first ring and the remaining piece was left in the socket.

This episode is about my attempt to remove the broken piece of the jack plug. To find out more about the method I used and how successful it was see the full notes with pictures here.

Note: The Amazon links below are for information. I have no financial involvement with Amazon; these are not Affiliate links.

hpr2080 :: Kdenlive Part 3: Effects and Transitions

Using effects and transitions in Kdenlive

Hosted by Geddes on 2016-07-22 and released under a CC-BY-SA license.
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Hello again HPR listeners this is Geddes back with Part 3 in the series covering the video editing application KdenLive. This time round we’ll be looking at effects and transitions which covers the following topics

  • Layout Mods
  • Fades
  • Dissolves
  • Slides and wipes
  • Chroma Key, aka green screen
  • Composited images and titles

Here’s the link to the original article.

hpr2079 :: Everyone Loves Some Acid House

Sigflup demonstrates how to make acid house quickly

Hosted by sigflup on 2016-07-21 and released under a CC-BY-SA license.
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In this episode of hpr sigflup makes some acid house. She uses Technobox2, which simulates the tb-303 and the tr-808

Roland TB-303 and TR-808

hpr2078 :: What's in my bag?

A short summary of all the crap Windigo lugs back and forth

Hosted by Windigo on 2016-07-20 and released under a CC-BY-SA license.
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If you should happen to find me on the road, don’t kill me! I’m an atheist!

Also, this will be the contents of my bag:

  • Stainless steel coffee mug, Stewarts-branded
  • Stanley stainless steel thermos
  • Kleen kanteen wide, 40oz stainless steel water bottle
  • 1½-foot micro USB cable
  • Ethernet cable (currently retractable)
  • Sony headphones
  • Handful of SD and USB storage, including 64GB primary on keychain
  • Maglite AA-powered flashlight
  • Ballpoint pen
  • Lunch, usually in a mason jar or metal box
  • If it’s Wednesday or Thursday, my backup drive
  • Dell Mini 9 with AC adapter
  • If I’m walking to the Tech Center, a ZaReason Verix laptop with AC adapter

hpr2077 :: and self hosting for friends and family

I talk a little about my network and how you can host services for your friends and family.

Hosted by Christopher M. Hobbs on 2016-07-19 and released under a CC-BY-SA license.
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What is is an island of pseudo-freedom. This project was established in order to pursue ideals of Free Software, Free Culture, ethically sourced hardware, self hosting, and sharing with others. Generally it consists of personal content, though some community resources reside here as well.

The name came from an old programming group and was repurposed. I would really like to find a new name!

Similar networks


The network

Set in three physical locations: two in Northwest Arkansas, one (a VPS) in Sweden.

One recycled shuttle rig called “summernight”, one ThinkPenguin nano called “aprilshowers”, and a VPS known as “eremit”. Two or three inaccessible machines for backups and other automation.

Wireless access provided in the model at both US physical locations.


  • Websites
  • Shell accounts
  • DNS
  • wireless access
  • XMPP
  • IRC Bots
  • Git
  • MediaGoblin

Future services

  • Game servers
  • and GNU Social instances
  • mail server
  • PBX with DID lines
  • data service

Events and community

The community is very loosely organized and rarely operates under the name of the network, though we sometimes gather for events in the same location as the machines. In the past we’ve had a cryptoparty and I am trying to organize a FreeDOOM LAN party.

How to host your own services

  1. Acquire a machine, any machine! Could be a junk rig, an old laptop, or a fancy single board computer.
  2. Install your favorite distro or try freedombone/freedom box.
  3. Get a domain name with your favorite registrar.
  4. Get a static IP from your ISP if possible or go with Dynamic DNS
  5. Install Bind or set up your router to manage DNS.
  6. Invite some friends to play on your new server! Maybe have a party!
  7. Set up backup scripts.

hpr2076 :: What Magazines I read Part 1

This is a short episode about the Magazines I read that may be of interest to other listeners

Hosted by Tony Hughes AKA TonyH1212 on 2016-07-18 and released under a CC-BY-SA license.
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Magazines I Read

Hi This is Tony Hughes for Hacker Public Radio, I'm trying to do a show once a month or so and I was thinking of ideas that might be of interest to the listeners out there.

While there are regular shows on 'What's on my pod-catcher' I've never heard one about what magazines that people in the HPR community like to read. With the advent of digital media and subscription services such as Issuu, Magzter, Google Play Newsstand and I'm sure many others which offer both Free and subscription content I'm sure many of you like me have quite a number of magazines you regularly read, and some you dip in to from time to time. So this show is about the Magazines I like to read.

First I'd like to say that to facilitate regularly reading of digital media I feel for me a 10" tablet is the smallest format for comfortable reading (although for those of you with young enough eyesight to be able to read small fonts with no difficulty you may feel different). However my Tablet of choice is the 12" Samsung SM-P900 which I purchased in February 2015. My only gripe with this tablet is I'll probably never get Android 6 on it as it's now over 2 years since original release. While I agree with Apple that the 4:3 screen configuration for reading on a tablet is more user friendly I can not bring myself to spend that kind of money or be tied to the Apple ecosystem.

So what Magazines do I actually read?

  • Linux Voice ( This is a Linux magazine that was set up a couple of years ago by some of the former editorial team from Linux Format after a successful Kick Starter Campaign. Good content for and about Linux and the Linux community and they support the community by distributing 50% of their annual profits back to the Open Source Community after a ballot of readers. They also release issues of the magazine with a creative commons licence 9 months after publication. This is the only magazine I currently have a Paper subscription to (it also comes with a free DRM free PDF copy for subscribers)

  • Linux Format ( Similar in content to Linux Voice but without quite the same community philosophy, but still a very good publication.

  • MicroMart ( This is a more general computer magazine that started in 1985, as a place you could buy and sell computers and components but is now more of a regular weekly magazine format with news, reviews and articles about all things computer and technology related. As I said in my Journey to Linux show this was the Magazine that introduced me to Linux in the late 90's early 00's. They still have a weekly Linux page and regular Raspberry Pi and other Linux related content.

  • MagpPi ( This is the official Monthly magazine of the Raspberry Pi Community and as you will have worked out is focused on all things Raspberry Pi. Lots of Good content including: News, tutorials, and reviews of new peripherals for the Pi, and since being brought in house by the foundation it has a very professional look and feel about it. All the content is provided by members of the Raspberry Pi Community both from inside, and outside the Foundation. You can get a free Creative commons PDF from the website or to support the foundation you can subscribe to both Print and digital copies if you wish to.

  • Full Circle Magazine ( This is a completely community driven magazine for all things related to Ubuntu Linux and its derivatives. They carry news of what is happening in the World of Ubuntu and articles and tutorials of how to use Linux software for both the beginner and more experienced users. This is a Creative Commons and can be downloaded free from the website in both PDF and e-book formats.

  • PCLinuxOS Magazine ( This is another community driven magazine from The PCLinuxOS community and is similar to Full Circle in its content, with the aim of helping users of this distro to get the most out of it they can. Also available as a free Creative Commons PDF download from their website.

hpr2075 :: Skin cancer

My recent experience with skin cancer, and a primer on UV

Hosted by Clinton Roy on 2016-07-15 and released under a CC-BY-SA license.
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This is a very personal podcast, discussing minor surgery. If that sort of stuff makes you cringe at all, this may not be the recording for you. I should also point out that I am not a medical professional, you should not take this recording as medical advice, if you have any concerns about your skin, seek professional medical advice.

I am a very white person living in Queensland, Australia. Our state has amongst the highest rate of skin cancers in the world, I believe we’re in a tussle with New Zealand for first place at the moment.

There are two main types of skin cancer, melanoma and non-melanoma. The non-melanoma type is slow growing, and rarely spreads to other parts of the body, while melanoma is fast growing and spreads to the rest of the body.

Both my parents have had multiple lesions excised, so something like this was always on my mind. We live in a sunny, sub-tropical environment, the sort of clothing you’d want to wear for comfort is light, breezy, and not covering much skin, exactly the wrong sort of clothes you’d need to wear to protect yourself from ultraviolet (UV) rays that help cause skin cancer.

According to the Australian BoM FAQ the per capita risk of skin cancer in Australia is ten times higher than America and sixty times higher than the UK.

The UV scale rarely gets above eight in the UK, in Brisbane the UV scale is above eight for roughly eight months of the year.

There are a lot of variables when it comes to UV. Cloud cover is probably the most important. Something that I can’t stress enough is that heat and UV are not correlated, you can definitely be exposed to lots of UV when it’s cold (see New Zealand, they’re much more south, much more cold, and have more exposure due to the ozone hole). Another example is snow, UV will bounce off the snow and back at you.

The link between skin cancer and UV is quite strong, 95-99% of skin cancers are caused by excess sun exposure. (

So, with all that history, I started getting yearly skin checks a couple of years ago. I’d had a couple of skin checks when I was very young, and now that I’m more advanced in years I wanted something less ad-hoc. Someone working for one such organisation gave a talk at one of the user groups I attended, and i made an appointment with Molemap. It’s a full on procedure where your entire body is photographed, and each mole, freckle, bump and lump that is of possible concern is photographed from a few centimetres off the skin, and with the magnification lens sitting right on top of the mole.

I have some near 200 spots on myself that are of interest, so my follow up appointments take about two and half hours to go over all these spots, plus looking for new ones. The hope is that, by doing this close to yearly, small changes in all these spots won’t go unnoticed, and we can get on top of any cancers early.

Interestingly, the spot that was actually a problem was a new one, so under a year old, and was hiding underneath my beard, so in future I’m definitely going to have my skin checked clean shaven.

The other thing I want to communicate is that early detection is key, all the skin cancers have a 90% plus survival rate (at five years) if caught early enough. This does potentially mean that a yearly check is not enough, but it’s already proven it’s worth to me.

Molemap only does photography of spots, and visual diagnosis. It does not do any treatment or biopsies or excisions, therefore there it has no self interest in recommending treatment on borderline cases. Molemap sprang out of a University of Queensland project, which is my alma mater. After receiving the diagnosis (via an online form, secured with a second factor sent to my phone) and panicking a fair bit, I contacted my regular doctors practice (we call them general practitioners in Australia, I’m sure they’re called different things elsewhere) for an appointment with a GP who had experience with skin cancers. In QLD, most medical centres will have at least one doctor with experience in this area. As it turns out, my regular GP has such experience and I got an appointment for the following week.

I wasn’t really sure what to expect from my GP appointment, but I was mostly expecting to get the diagnosis confirmed, and either get sent to a specialist to deal with it, or organise another appointment at the GP.

What actually happened was it took all of five minutes for my doctor to confirm the diagnosis, then work how he had time in his schedule, and there was a nurse free, to excise the lesion straight away. I was given a local anaesthetic, so I felt no pain whatsoever, but you still feel the doctor pulling on your skin up, down left and right, so that the complete lesion can be removed, as well as a small amount of surrounding skin in case the cancer has spread.

Here I should mention that melanomas spread very fast, and when they’re excised up to a centimetre of skin may need to be removed, where as for a non-melanomic, a millimetre or so is good enough.

I got four sutures put in, they stayed for a week (we have a long easter break in Australia) so it ended up being closer to a week and a half. I had no problems, my scar healed up quickly and nicely. Now, a couple of months later, there’s a little redness along the scar line, but that’s about it.

So. The take aways. UV is not correlated to heat, you can get a lot of UV exposure in cold environments. If you’re travelling through a high UV area, take precautions (clothes that cover a lot of your skin, hat, sunglasses, sunscreen). If you live in a high UV area, get your skin checked regularly. Also, keep an eye on your own skin. Use a diary to record any new bumps, lumps, spots etc.

hpr2073 :: The power of GNU Readline - part 1

There's a lot you can do to speed up typing by using GNU Readline. We'll explore how in this series

Hosted by Dave Morriss on 2016-07-13 and released under a CC-BY-SA license.
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The power of GNU Readline - part 1

We all use GNU Readline if we we use the CLI in Linux because it manages input, line editing and command history in Bash and in many tools.

I have been using Unix and later Linux since the 1980's, and gradually learnt how to do things like jump to the start or the end of the line, delete a character backwards up to a space, or delete the entire line.

I think that learning GNU Readline is worthwhile since it contains a lot more features than what I just described. I thought I would do a few episodes on HPR to introduce some of what I consider to be the most useful features.

I want to keep the episodes short since this is a dry subject, and, if you are anything like me, you can't take in more than a few key sequences at a time.

The source of my information is the GNU Readline Manual. This is very well written, if a little overwhelming.

To read the rest of the notes for this episode follow this link: