Canonical Voices

Posts tagged with 'ubuntu'

Leo Arias

We have survived two testing days, and now we can safely say that it will become a Friday tradition :)

Last Friday our nice guest was Aaron Ogle, from Rocket Chat. He gave us a tour on the Rocket Chat UI and we discussed about how they packaged it as a snap.

If you missed it, click the image below to watch it.

Alt text

Building from what we saw on the first session, we tested the snap using a virtual machine again. But this time, we cloned it to keep a pristine machine and make following testing sessions faster. If you want to help the Ubuntu and Rocket Chat communities, this is an easy way to prepare your environment:

Once you have your clone ready, install the most recent and bleeding edge version of rocket chat with:

$ sudo snap install rocketchat-server --edge

Then you can follow this gist with the initial steps to start testing the Rocket Chat snap

Also you can test a real installation of Rocket Chat, joining our community channel, where we are available all day, every day. If you have a question, just ask. I am elopio in there.

During the session we took a look at the GitHub website, where many free software communities do their development in the open. They have a great guide to start contributing to open source projects. Go on and spread your love for free software in the form of bug reports :)

The gratitude this week goes to our newly acquired staff members Julia and Kyle, and of course to Aaron for letting us have a funny Friday evening. Make sure to take a look at the cool things he and his teammates are doing; and if you have some free time and want to join an exciting, open and nice community, give them a hand. Also try the Jitsi integration for video conference, it's mind-blowing that there are no closed components anywhere.

See you next Friday at Ubuntu On-Air.

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Leo Arias

The basic idea of using virtual machines for testing is to always start from a clean state, as close as possible to what a user would get after freshly installing the system on their real machines.

So, every time we need to test something, we could create a new virtual machine and intall Ubuntu from scratch there, but that would take a considerable amount of time.

An alternative is to install a machine once, and keep it clean. Never test in that one, and instead clone it every time you need to test something. Use the clone to experiment, and delete it when you are done. Cloning the machine is a lot faster than reinstalling each time. The base machine, the one you clone everytime, is called a pristine machine. If you are careful with it, the only time you will need to reinstall is when you are testing the installer.

Cloning the pristine machine using Virtual Machine Manager is really simple, it’s done in like two clicks.

First, of course, you will need to install your pristine machine. I always put pristine in the name, to make it less likely that I will start using it for testing. Every time I forget and play with the pristine machine, I’m polluting its state, and have to recreate it.

With the pristine machine ready, I then recommend to open it and run in a terminal:

  sudo apt update && sudo apt upgrade

That will update all the packages installed, so your clone starts also in the most up-to-date state. If you do this step every time, you will never have to wait for long while your machine downloads and installs lots of packages, just wait a little every day.

image

Now shut down the pristine machine and don’t touch it again, only to update it.

To clone it, right click on it and then click the Clone... button.

image

A dialog will be opened, where you can enter the new virtual machine details.

image

I always write the date as part of the name, to remember when I created it. But the most important thing to do here is to make sure that the Storage option is set to Clone this disk. Otherwise, you will be sharing the disk with the pristine machine, which will pollute its state, the exact thing we are trying to avoid.

This will take some time while the whole disk is copied. But not long, and once it’s done you can freely play and pollute this clone, without affecting the pristine machine.

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Leo Arias

Today we had our first testing day. We will keep doing this every Friday, and at the end of the session I will post a summary with links to follow up and learn more about the subject in case somebody is interested.

You can watch the video by clicking the image below.

Alt text

For this session we had Kyle Fazzari talking about his work as the maintainer of the Nextcloud snap.

You can find more info about the project in the Nextcloud main page and more info about the snap in Kyle's blog.

We tested the snap using a virtual machine. To set one up you can use the following guides:

After the virtual machine is ready, Nextcloud can be installed in there by just running in the terminal:

$ sudo snap install nextcloud

If you want to test an unreleased and unstable version to help the Nextcloud developers, you can add the flag --edge or --beta to that command.

I wrote some steps to guide you getting started with the testing in this gist.

And finally, if you want to join our community, we are usually in Rocket Chat. You can join the #community, #qa or #snapcraft channels, or any other that catches your attention.

Special thanks to Julia and CoderEurope for joining us during the session. And of course to Kyle and the Nextcloud community for this amazing piece of free software that encourages everybody to take control over their data, in a really simple way.

You are all invited to join us the next time, which will be Friday, December 2nd, again at Ubuntu On-Air. The time and theme will be announced soon. Or at least before it starts.

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Daniel Holbach

ucaday-64pxIt’s 20th November 2016, so today marks another Ubuntu Community Appreciation Day. The idea for the event was put together by Ahmed Shams in 2011 and it’s simple but brilliant: once a year (at least), take the time to thank some specific people for their work in Ubuntu.

As I’m at UbuCon Europe this weekend, it’s incredibly easy to pick somebody whose work I’m grateful for. Today I’d like to thank all the event organisers in the Ubuntu world. Without people like Sujeevan Vijayakumaran (in the case of UbuCon Europe), we as a community, wouldn’t be able to get together, learn from each other and have fun together. It takes a set of special skills to organise big and small events, plan ahead, talk to various people and companies, organise sponsors and helpers and it’s something we often take too much for granted.

Thank you everyone who organised the Ubuntu events I’ve been to over the years, no matter if it’s the small meetings in a bar or the crazy big events, like UDSes (thanks Claire, Marianna and Michelle!). You are incredible rockstars and I had some of my best times thanks to you!

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Daniel Holbach

Ubuntu Online SummitEarlier this week the Ubuntu community was busy with the Ubuntu Online Summit. If you head to the schedule page, you can watch all the sessions which happened.

As I’m interested in snaps a lot, I’d like to highlight some of the sessions which happened there, so if you missed them, you can go back and see what happened there:

  • Intro and keynote by Gustavo Niemeyer
    Gustavo (amongst others projects he is involved with) is one of the lead developers of snapd. During his keynote he gives an overview over what the team has been working on in the last time and explains which features all landed in the snap world recently. It quickly gives you an idea of the pace of development and the breadth of new features which landed.
  • Creating your first snap
    This is a session I gave. Unfortunately Didier couldn’t make it as he had lost his voice in the days before. We both worked together on the content for this. Basically, if you’re new to using and creating snaps, watch this. It’s a series of very simple steps you can follow along and gives you enough background to see the bigger picture.
  • Snap roadmap and Q&A
    This was a fun session with Michael Vogt and Zygmunt Krynicki. They are also both lead developers of snapd and they share a lot of their thoughts in their own very fun and very interesting way. After some discussion of the roadmap, they dived right into the almost endless stream of questions. If you want to get an idea of what’s coming up and some of the more general decisions behind snaps, watch this one.
  • Building snaps in Launchpad
    Colin Watson gave this demo of a beautiful new feature in Launchpad. Starting from a github repo (the source could live elsewhere too), the source is pulled into Launchpad, snaps are built for selected releases of Ubuntu and selected architectures and directly pushed to the store. It’s incredibly easy to set up, complements your CI process and makes building on various architectures and publishing the snaps trivial. Thanks a lot for everybody’s work on this!

The other sessions were great too, this is just what I picked up from the world of snaps.

Enjoy watching the videos and share them please!

Thanks a lot to all the session leads as well!

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Daniel Holbach

Ubuntu Online Summit coming up 15-16 Nov

Ubuntu Online Summit

Ubuntu Online Summit is here again! 15th and 16th November 2016 we are talking about the great stuff which landed in Ubuntu 16.10 and we talk about our plans for 17.04.

Now is the last call for adding sessions, find out how to do that here.

See you all next week!

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bmichaelsen

Meist scheint manches auf den ersten Blick unmöglich.
Manches ist es auch, doch es wäre tödlich, das selbst zu glauben solange noch nichts feststeht
und die Party zu verlassen, bevor sie losgeht.

— Die Sterne, Stell die Verbindung her

Yesterday, two nice things happened: For one, LibreOffice 5.2.3 has been released and secondly Ubuntu Core 16 has been released. But beyond that, something in the middle between these two has happened: LibreOffice 5.2.3 has been released to the stable channel of the snap store at the same day. Now LibreOffice has been in the snap store for some time — and has also been on the stable channel since the Ubuntu 16.10 release. But this is the first time the LibreOffice snap is released in sync with The Document Foundation announcing the general availability of the final downloads. This was possible even though I was on vacation yesterday: LibreOffice snap packages are now being build on launchpad, which simplifies a lot, and launchpad can be asked to populate the edge channel of the store. This is making life very easy. Having smoketested the amd64 build from that channel before, to release LibreOffice 5.2.3 to the beta/candidate/stable channels too all I had to do was push three buttons on a web interface and it was available to all.

Building on launchpad, I also had the opportunity to create builds for armhf and i386 along with the usual amd64 builds with little extra effort. If you are adventurous you are encouraged to test these builds too: Be aware though that these so far aren’t even smoketested, I havent looked at them at all yet, so use them at your own risk.

All in all, this is great progress: LibreOffice 5.2.3 is available to users of Ubuntu 16.10 and Ubuntu 16.04 LTS as a snap on the day of the upstream release. And beyond that on all other distributions where snap is available — quite a few these days.

Update: ICYMI here is how to get the LibreOffice snap: http://www.libreoffice.org/download/snap/ — although strictly speaking you dont need the --channel=beta option anymore now. I will fix that soon.


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Dustin Kirkland

If you haven't heard about last week's Dirty COW vulnerability, I hope all of your Linux systems are automatically patching themselves...


Why?  Because every single Linux-based phone, router, modem, tablet, desktop, PC, server, virtual machine, and absolutely everything in between -- including all versions of Ubuntu since 2007 -- was vulnerable to this face-palming critical security vulnerability.

Any non-root local user of a vulnerable system can easily exploit the vulnerability and become the root user in a matter of a few seconds.  Watch...


Coincidentally, just before the vulnerability was published, we released the Canonical Livepatch Service for Ubuntu 16.04 LTS.  The thousands of users who enabled canonical-livepatch on their Ubuntu 16.04 LTS systems with those first few hours received and applied the fix to Dirty COW, automatically, in the background, and without rebooting!

If you haven't already enabled the Canonical Livepatch Service on your Ubuntu 16.04 LTS systems, you should really consider doing so, with 3 easy steps:
  1. Go to https://ubuntu.com/livepatch and retrieve your livepatch token
  2. Install the canonical-livepatch snap
    $ sudo snap install canonical-livepatch 
  3. Enable the service with your token
    $ sudo canonical-livepatch enable [TOKEN]
And you’re done! You can check the status at any time using:

$ canonical-livepatch status --verbose

Let's retry that same vulnerability, on the same system, but this time, having been livepatched...


Aha!  Thwarted!

So that's the Ubuntu 16.04 LTS kernel space...  What about userspace?  Most of the other recent, branded vulnerabilities (Heartbleed, ShellShock, CRIME, BEAST) have been critical vulnerabilities in userspace packages.

As of Ubuntu 16.04 LTS, the unattended-upgrades package is now part of the default package set, so you should already have it installed on your Ubuntu desktops and servers.  If you don't already have it installed, you can install it with:

$ sudo apt install unattended-upgrades

And moreover, as of Ubuntu 16.04 LTS, the unattended-upgrades package automatically downloads and installs important security updates once per day, automatically patching critical security vulnerabilities and keeping your Ubuntu systems safe by default.  Older versions of Ubuntu (or Ubuntu systems that upgraded to 16.04) might need to enable this behavior using:

$ sudo dpkg-reconfigure unattended-upgrades


With that combination enabled -- (1) automatic livepatches to your kernel, plus (2) automatic application of security package updates -- Ubuntu 16.04 LTS is the most secure Linux distribution to date.  Period.

Mooooo,
:-Dustin

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Grazina Borosko

The Yakkety Yak 16.10 is released and now you can download the new wallpaper by clicking here. It’s the latest part of the set for the Ubuntu 2016 releases following Xenial Xerus. You can read about our wallpaper visual design process here.

Ubuntu 16.10 Yakkety Yak

yakkety_yak_wallpaper_4096x2304

Ubuntu 16.10 Yakkety Yak (light version)

yakkety_yak_wallpaper_4096x2304_grey_version

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Dustin Kirkland

My wife, Kimberly, and I watch Saturday Night Live religiously.  As in, we probably haven't missed a single episode since we started dating more than 12 years ago.  And in fact, we both watched our fair share of SNL before we had even met, going back to our teenage years.

We were catching up on SNL's 42nd season premier late this past Sunday night, after putting the kids to bed, when I was excited to see a hilarious sketch/parody of Mr. Robot.

If SNL is my oldest TV favorite, Mr. Robot is certainly my newest!  Just wrapping its 2nd season, it's a brilliantly written, flawlessly acted, impeccably set techno drama series on USA.  I'm completely smitten, and the story seems to be just getting started!

Okay, so Kim and I are watching a hilarious sketch where Leslie Jones asks Elliot to track down the person who recently hacked her social media accounts.  And, as always, I take note of what's going in the background on the computer screen.  It's just something I do.  I love to try and spot the app, the OS, the version, identify the Linux kernel oops, etc., of anything on any computer screen on TV.

At about the 1:32 mark of the SNL/Mr.Robot skit, there was something unmistakable on the left computer, just over actor Pete Davidson's right shoulder.  Merely a fraction of a second, and I recognized it instantly!  A dark terminal, split into a dozen sections.  A light grey boarder, with a thicker grey highlighting one split.  The green drip of text from The Matrix in one of the splits. A flashing, bouncing yellow audio wave in another.  An instant rearrangement of all of those windows each second.

It was Byobu and Hollywood!  I knew it.  Kim didn't believe me at first, until I proved it ;-)

A couple of years ago, after seeing a 007 film in the theater, I created a bit of silliness -- a joke of a program that could turn any Linux terminal into a James Bond caliber hacker screen.  The result is a package called hollywood, which any Ubuntu user can install and run by simply typing:

$ sudo apt install hollywood
$ hollywood

And a few months ago , Hollywood found its way into an NBC News piece that took itself perhaps a little too seriously, as it drummed up a bit of fear around "Ransomware".

But, far more appropriately, I'm absolutely delighted to see another NBC program -- Saturday Night Live -- using Hollywood exactly as intended -- for parody!

Enjoy a few screenshots below...








Cheers!
:-Dustin

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Victor Palau

Ok, ok.. sorry for the click-bait headline – but It is mainly true.. I recently got a Nextcloud box , it was pretty easy to set up and here are some great instructions.

But this box is not just a Nextcloud box, it is  a box of unlimited possibilities. In just a few hours I added to my personal cloud  a WIFI access point and  chat server.   So here are some amazing facts you should know about Ubuntu and snaps:

Amazing fact #1 – One box, many apps

With snaps you can transform you single function device, into a box of tricks. You can add software to extend its functionality after you have made it. In this case I created an WIFI access point and added a Rocketchat server to it.

You can release a drone without autonomous capabilities, and once you are sure that you have nailed, you can publish a new app for it… or even sale a pro-version autopilot snap.

You can add an inexpensive Zigbee and Bluetooth module to your home router, and partner with a security firm to provide home surveillance services.. The possibilities are endless.

Amazing fact #2 – Many boxes, One heart

Maybe an infinite box of tricks is attractive to a geek like me,  but what it is interesting is product makers is :make one hardware, ship many products.

Compute parts (cpu,memory,storage) make a large part of  bill of materials of any smart device. So does validation and integration of this components with your software base… and then you need to provide updates for the OS and the kernel for years to come.

What if I told you could build (or buy) a single multi-function core – pre-integrated with a Linux OS  and use it to make drones, home routers, digital advertisement signs, industrial and home automation hubs, base stations, DSLAMs, top-of-rack switches,…

This is the real power of Ubuntu Core, with the OS and kernel being their own snaps – you can be sure the nothing has changes in them across these devices, and that you can reliably update of them.  You not only are able to share validation and maintenance cost across multiple projects, you would be able to increase the volume of your part order and get a better price.

20160927_101912

How was the box of tricks made:

Ingredients for the WIFI ap:

 

I also installed the Rocketchat server  snap for the store.

 


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bmichaelsen

Merging Communities

Come together, right now
— Beatles, Abbey Road, Come together

So September, 28th 2016 is the 6th birthday of LibreOffice and at the recent conference, we took a picture of those who were there on day zero:

brno32

As you might notice, I am not on that picture — on day zero I was working at Oracle, and were surprised by the news — like many others in this picture:

brno30

This is everyone at this years LibreOffice conference who used to work on the OpenOffice.org codebase at StarDivision, Sun or Oracle. A few people are in both pictures: Caolán McNamara and Thorsten Behrens were with LibreOffice from the start, but also worked at the OpenOffice.org team in Hamburg at some point in time. Of those working on OpenOffice.org still when LibreOffice started, I was the first to join LibreOffice — I had quit my job for that. It was an exciting time.

Looking back, both of these groups appear small — mostly because merging them, the LibreOffice community became so much more that the sum of its parts:

brno23

And of course, while a lot of people were at the conference, not everyone could
join, so there are more contributors from each of these groups than are in the
pictures. This years “state of the project” presentation showed again that the members of The Document Foundation are a truly worldwide community:

tdf-members

So, like the branches of the different descendants of OpenOffice.org, the
contributors and communities did come together in Brno to push
LibreOffice forward as one!


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Michael Hall

KDE Neon developer Harald Sitter was able to package up the KDE calculator, kcalc, in a snap that weighs in at a mere 320KB! How did he do it?

KCalc and KDE Frameworks snaps

Like most applications in KDE, kcalc depends on several KDE Frameworks (though not all), sets of libraries and services that provide the common functionality and shared UI/UX found in KDE and it’s suite of applications. This means that, while kcalc is itself a small application, it’s dependency chain is not. In the past, any KDE application snap had to include many megabytes of platforms dependencies, even for the smallest app.

Recently I introduced the new “content” interface that has been added to snapd. I used this interface to share plugin code with a text editor, but Harald has taken it even further and created a KDE Frameworks snap that can share the entire platform with applications that are built on it!

While still in the very early stages of development, this approach will allow the KDE project to deliver all of their applications as independent snaps, while still letting them all share the one common set of Frameworks that they depend on. The end result will be that you, the user, will get the very latest stable (or development!) version of the KDE platform and applications, direct from KDE themselves, even if you’re on a stable/LTS release of your distro.

If you are running a snap-capable distro, you can try these experimental packages yourself by downloading kde-frameworks-5_5.26_amd64.snap and kcalc_0_amd64.snap from Neon’s build servers, and installing them with “snap install –devmode –force-dangerous <snap_file>”. To learn more about how he did this, and to help him build more KDE application snaps, you can find Harald as <sitter> on #kde-neon on Freenode IRC.

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Dustin Kirkland


A couple of weeks ago, I delivered a talk at the Container Camp UK 2016.  It was an brilliant event, on a beautiful stage at Picturehouse Central in Picadilly Circus in London.

You're welcome to view the slides or download them as a PDF, or watch my talk below.

And for the techies who want to skip the slide fluff and get their hands dirty, setup your OpenStack and LXD and start streamlining your HPC workloads using this guide.




Enjoy,
:-Dustin

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Daniel Holbach

For a few weeks we have been running the Snappy Playpen as a pet/research project already. Many great things have happened since then:

  • With the Playpen we now have a repository of great best-practice examples.
  • We brought together a lot of people who are excited about snaps, who worked together, collaborated, wrote plugins together and improved snapcraft and friends.
  • A number of cloud parts were put together by the team as well.
  • We landed quite a few high-quality snaps in the store.
  • We had lots of fun.

Opening the Sandpit

With our next Snappy Playpen event tomorrow, 20th September 2016, we want to extend the scheme. We are opening the Sandpit part of the Playpen!

One thing we realised in the last weeks is that we treated the Playpen more and more like a place where well-working, tested and well-understood snaps go to inspire people who are new to snapping software. What we saw as well was that lots of fellow snappers kept their half-done snaps on their hard-disk instead of sharing them and giving others the chance to finish them or get involved in fixing. Time to change that, time for the Sandpit!

In the Sandpit things can get messy, but you get to explore and play around. It’s fun. Naturally things need to be light-weight, which is why we organise the Sandpit on just a simple wiki page. The way it works is that if you have a half-finished snap, you simply push it to a repo, add your name and the link to the wiki, so others get a chance to take a look and work together with you on it.

Tomorrow, 20th September 2016, we are going to get together again and help each other snapping, clean up old bits, fix things, explain, hang out and have a good time. If you want to join, you’re welcome. We’re on Gitter and on IRC.

  • WHEN: 2016-09-20
  • WHAT: Snappy Playpen event – opening the Sandpit
  • WHERE: Gitter and on IRC

Added bonus

As an added bonus, we are going to invite Michael Vogt, one of the core developers of snapd to the Ubuntu Community Q&A tomorrow. Join us at 15:00 UTC tomorrow on http://ubuntuonair.com and ask all the questions you always had!

See you tomorrow!

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Daniel Holbach

Are you interested in snapping software and need help?

snapcraft-website

There’s a lot of good reasons for snapping software:

  • You get software out to millions of users: Ubuntu (snapd installed by default since Ubuntu 16.04 LTS), snapd available too on Arch, Debian, Gentoo, Fedora, openSUSE, openembedded, yocto and OpenWRT.
  • You get to define the experience: ship the stack the way you tested it. Just one simple test-scenario for you.
  • Building a snap is simple (one piece of YAML controls the build), publishing is instantaneous (one command to run, automatic review).
  • Multiple release channels in the store.

If you’re intrigued but need help to get started, tomorrow is a great time for this, as we’re going to have another Snappy Playpen event.

Tomorrow (13th Sept 2016) we are going to hang out on Gitter and IRC and will be there to answer your questions, work on snaps together and have fun!

In the Snappy Playpen project we are collecting best-practices and work on getting snaps out there together. We’re a friendly bunch and look forward to meeting you!

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Michael Hall

Snaps are a great way to get the most up to date applications on your desktop without putting the security or stability or your system at risk. I’ve been snapping up a bunch of things lately and the potential this new paradigm offers is going to be revolutionary. Unfortunately nothing comes for free, and the security of snaps comes with some necessary tradeoffs like isolation and confinement, which reduces some of the power and flexibility we’ve become used to as Linux users.

But now the developers of the snappy system (snapd, snap-confine and snapcraft) are giving us back some of that missing flexibility in the form of a new “content” interface which allows you to share files (executables, libraries, or data) between the snap packages that you develop. I decided to take this new interface for a test drive using one of the applications I had recently snapped: Geany, my editor of choice. Geany has the ability to load plugins to extend it’s functionality, and infact has a set of plugins available in a separate Github repository from the application itself.

I already had a working snap for Geany, so the next thing I had to do was create a snap for the plugins. Like Geany itself, the plugins are hosted on GitHub and have a nice build configuration already, so turning it into a snap was pretty trivial. I used the autotools plugin in Snapcraft to pull the git source and build all of the available plugins. Because my Geany snap was built with Gtk+ 3, I had to build the plugins for the same toolkit, but other than that I didn’t have to do anything special.

parts:
 all-plugins:
 plugin: autotools
 source: git@github.com:geany/geany-plugins.git
 source-type: git
 configflags: [--enable-gtk3=yes --enable-all-plugins]

Now that I had a geany.snap and geany-plugins.snap, the next step was to get them working together. Specifically I wanted Geany to be able to see and load the plugin files from the plugins snap, so it was really just a one-way sharing. To do this I had to create both a slot and a plug using the content interface. Usually when you’re building snap you only use plugs, such as network or x11, because you are consuming services provided by the core OS. In those cases also you just have to provide the interface name in the list of plugs, because the interface and the plug have the same name.

But with the content interface you need to do more than that. Because different snaps will provide different content, and a single snap can provide multiple kinds of content, you have to define a new name that is specific to what content you are sharing. So in my geany-plugins snapcraft.yaml I defined a new kind of content that I called geany-plugins-all (because it contains all the geany plugins in the snap), and I put that into a slot called geany-plugins-slot which is how we will refer to it later. I told snapcraft that this new slot was using the content interface, and then finally told it what content to share across that interface, which for geany-plugins was the entire snap’s content.

slots:
 geany-plugins-slot:
 content: geany-plugins-all
 interface: content
 read:
 - /

With that I had one half of the content interface defined. I had a geany-plugins.snap that was able to share all of it’s content with another snap. The next step was to implement the plug half of the interface in my existing geany.snap. This time instead of using a slots: section I would define a plugs: section, with a new plug named geany-plugins-plug and again specifying the interface to be content just like in the slot. Here again I had to specify the content by name, which had to match the geany-plugins-all that was used in the slot. The names of the plug and slot are only relevant to the user who needs to connect them, it’s this content name that snapd uses to make sure they can be connected in the first place. Finally I had to give the plug a target directory for where the shared content will be put. I chose a directory called plugins, and when the snaps are connected the geany-plugins.snap content will be bind-mounted into this directory in the geany.snap

plugs:
 geany-plugins-plug:
 content: geany-plugins-all
 default-provider: geany-plugins
 interface: content
 target: plugins

Lastly I needed to tell snapcraft which app would use this interface. Since the Geany snap only has one, I added it there.

apps:
 geany:
 command: gtk-launch geany
 plugs: [x11, unity7, home, geany-plugins-plug]

Once the snaps were built, I could install them and the new plug and slot were automatically connected

$ snap interfaces
Slot                             Plug
geany-plugins:geany-plugins-slot geany:geany-plugins-plug

Now that put the plugins into the application’s snap space, but it wasn’t enough for Geany to actually find them. To do that I used Geany’s Extra plugin path preferences to point it to the location of the shared plugin files.

Screenshot from 2016-08-30 16-27-12

After doing that, I could open the Plugin manager and see all of the newly shared plugins. Not all of them work, and some assume specific install locations or access to other parts of the filesystem that they won’t have being in a snap. The Geany developers warned me about that, but the ones I really wanted appear to work.

Screenshot from 2016-08-30 16-29-54

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Dustin Kirkland


I hope you'll enjoy a shiny new 6-part blog series I recently published at Linux.com.
  1. The first article is a bit of back story, perhaps a behind-the-scenes look at the motivations, timelines, and some of the work performed between Microsoft and Canonical to bring Ubuntu to Windows.
  2. The second article is an updated getting-started guide, with screenshots, showing a Windows 10 user exactly how to enable and run Ubuntu on Windows.
  3. The third article walks through a dozen or so examples of the most essential command line utilities a Windows user, new to Ubuntu (and Bash), should absolutely learn.
  4. The fourth article shows how to write and execute your first script, "Howdy, Windows!", in 6 different dynamic scripting languages (Bash, Python, Perl, Ruby, PHP, and NodeJS).
  5. The fifth article demonstrates how to write, compile, and execute your first program in 7 different compiled programming languages (C, C++, Fortran, Golang).
  6. The sixth and final article conducts some performance benchmarks of the CPU, Memory, Disk, and Network, in both native Ubuntu on a physical machine, and Ubuntu on Windows running on the same system.
I really enjoyed writing these.  Hopefully you'll try some of the examples, and share your experiences using Ubuntu native utilities on a Windows desktop.  You can find the source code of the programming examples in Github and Launchpad:
Cheers,
Dustin

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deviceguy

Sensors are an important part of IoT. Phones, robots and drones all have a slurry of sensors. Sensor chips are everywhere, doing all kinds of jobs to help and entertain us. Modern games and game consoles can thank sensors for some wonderfully active games.

Since I became involved with sensors and wrote QtSensorGestures as part of the QtSensors team at Nokia, sensors have only gotten cheaper and more prolific.

I used Ubuntu Server, snappy, a raspberry pi 3, and the senseHAT sensor board to create a senseHAT sensors snap. Of course, this currently only runs in devmode on raspberry pi3 (and pi2 as well) .

To future proof this, I wanted to get sensor data all the way up to QtSensors, for future QML access.

I now work at Canonical. Snappy is new and still in heavy development so I did run into a few issues. First up was QFactoryLoader which finds and loads plugins, was not looking in the correct spot. For some reason, it uses $SNAP/usr/bin as it's QT_PLUGIN_PATH. I got around this for now by using a wrapper script and setting QT_PLUGIN_PATH to $SNAP/usr/lib/arm-linux-gnueabihf/qt5/plugins

Second issue was that QSensorManager could not see it's configuration file in /etc/xdg/QtProject which is not accessible to a snap. So I used the wrapper script to set up  XDG_CONFIG_DIRS as $SNAP/etc/xdg

[NOTE] I just discovered there is a part named "qt5conf" that can be used to setup Qt's env vars by using the included command qt5-launch  to run your snap's commands.

Since there is no libhybris in Ubuntu Core, I had to decide what QtSensor backend to use. I could have used sensorfw, or maybe iio-sensor-proxy but RTIMULib already worked for senseHAT. It was easier to write a QtSensors plugin that used RTIMULib, as opposed to adding it into sensorfw. iio-sensor-proxy is more for laptop like machines and lacks many sensors.
RTIMULib uses a configuration file that needs to be in a writable area, to hold additional device specific calibration data. Luckily, one of it's functions takes a directory path to look in. Since I was creating the plugin, I made it use a new variable SENSEHAT_CONFIG_DIR so I could then set that up in the wrapper script.

This also runs in confinement without devmode, but involves a simple sensors snapd interface.
One of the issues I can already see with this is that there are a myriad ways of accessing the sensors. Different kernel interfaces - iio,  sysfs, evdev, different middleware - android SensorManager/hybris, libhardware/hybris, sensorfw and others either I cannot speak of or do not know about.

Once the snap goes through a review, it will live here https://code.launchpad.net/~snappy-hwe-team/snappy-hwe-snaps/+git/sensehat, but for now, there is working code is at my sensehat repo.

Next up to snapify, the Matrix Creator sensor array! Perhaps I can use my sensorfw snap or iio-sensor-proxy snap for that.

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Daniel Holbach

Snapcraft

Over the last few weeks, Tuesday has become the Snappy Playpen day. Although you can find us on IRC and Gitter all the time basically, Tuesday is where many of us have their eyeballs locked on the discussion and are happy to help out.

We’re making no exception tomorrow, 19th July 2016 will be another Snappy Playpen event.

It’s beautiful to see all the recent additions to the Snappy Playpen repository and other contributions. Just check out the snapcraft social media channels (Facebook, Twitter, Google+) to get an idea.

We very much want to continue down that road: get more software snapped, help newcomers, get snapcraft.yaml files submitted upstream, fix documentation, answer questions, and grow together as a community.

Tomorrow will have the great advantage, that most of the people working on snapd and snapcraft are sprinting in Heidelberg right now. So they are all in the same place physically, so we are going to try to talk them into helping out and joining us for some Playpen activity.

To get started, have a look at the snapcraft.io page and ask us all your questions tomorrow! We’re looking forward to seeing you there.

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