Ubuntu Core is a minimal version of Ubuntu intended for large-scale deployments, bringing transactional updates through the "snappy" packaging system.

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Snappy and Robotics

I am interesting in the Snappy environment for robotics development with the raspberry pi and other such hardware. I am very new at all of this, so what are the benefits of snappy in iOT versus, say, ...
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2k views

What is Snapcraft?

I've been trying snappy Ubuntu core on a Raspberry Pi 2 device, and I've heard I can use Snapcraft to do development on it. Now I hear that snaps are available on the desktop and server for Ubuntu 16....
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Sharing resources between snappy packages

Sharing resources My first example snap build is a java server I developed. I managed to create a snap that contains the jre, my server and the service startup. Everything works fine. The snap file ...
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20 views

Ubuntu Snappy XAMPP Pi2

Is there a way to install xampp in Ubuntu snappy 14.04 Raspberry Pi 2?
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89 views

Install Unity8 apps on Ubuntu 16.04

Is there a way to install Unity8 apps like terminal and file explorer as snappy packages on Ubuntu 16.04LTS? I am not looking for a PPA with precompiled binaries, but for the actual snappy packages. ...
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0answers
21 views

Internal server error when retrieving files from the archive in lxd

I'm trying to build a package with snapcraft cleanbuild which uses lxd to build a snap in a container. Unfortunately it fails pretty quickly with an http 500 error. The host is able to connect fine, ...
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76 views

Testing clean snapcraft build

I've made a snapcraft.yaml for an application. It builds on my computer but a friend finds it doesn't build for him. How can I make sure a snap builds for everyone before I share it?
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1answer
572 views

Difference between Snappy and Click

I don't understand the difference between Snappy and Click. Both allow for image based system updates. Both use AppArmor to confine apps. Soon Click will run on the desktop, phone and tablet and ...
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1answer
2k views

How does Snappy relate to Nix and Guix?

I searched for a comparison but found non and am not quite well informed enough to do it myself right now. All of them provide transactional updates, but different levels of containment. Snappy ...
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822 views

How do I repackage a .deb for Ubuntu Snappy?

I want to convert some Ubuntu software in .deb, specifically guake, to packages for Ubuntu Snappy*. According to the documentation on the Ubuntu dev tools, All metadata lives in meta/package....
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2answers
274 views

How to update all Snap packages

I know that I can update a snap package using sudo snap refresh <package> But there is a way to update all snaps, like sudo apt dist-upgrade
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71 views

How are Ubuntu snaps updated and upgraded?

I know I can upgrade an individual snap with the sudo snap refresh $SNAPNAME command, but I'm wondering whether there is a single command to upgrade all snaps at once. Or are they upgraded ...
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57 views

How do system services work in snaps

When creating a snap, and according to the syntax of the snapcraft.yaml file, the daemon keyword can be added to specify that the app will be run as a system service. As an example of such declaration:...
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102 views

How to debug snaps

I've successfully built a snap that I can install on my system. However, it crashes upon start, and I'm not quite sure where to start debugging that crash. What are the different approaches to ...
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1answer
108 views

How does Click/Snappy solve dependency issues?

There is a bit of confusion surrounding click and snappy. For one, I understand that there are certain packages that are not allowed to be shared due to app-armor. For example, if I write a Qt ...
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3answers
1k views

start GUI interface from command line in snappy ubuntu

How can i get into desktop /gui of snappy ubuntu from putty? startx command is not working or is there any way to do loke real vnc m using raspberry pi2+snappy core
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1answer
106 views

How to start the snapcraft app?

I have sideloaded snapcraft java-hello-world app. I am wondering how to start the same. I have tried to invoke the wrapper in the shell and I get java not found. (amd64)ubuntu@IndiaDevResSnappy3:/...
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1answer
84 views

What is devmode for snaps?

I have heard about the ability to use snaps in developer mode. What is this mode and what can I use it for?
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4answers
7k views

Why is Ubuntu moving to Snappy packages?

Why Ubuntu dumping .deb packages and moving to .snappy packages? (At least for now they are keeping .deb package for normal distributions). .deb is already the most popular packaging out there. ...
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1answer
100 views

Ubuntu 16.04 snap install error

I'm having problems installing snap-packages on Ubuntu 16.04 x64. For example, when I try to install hello-world, it downloads ubuntu-core and then throws this error: ~$ sudo snap install hello-...
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Mounting a drive Ubuntu Snappy

Seeing as the Snappy Ubuntu filesystem is so locked down I was wondering whether one can mount and access an external drive in Ubuntu Snappy?
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154 views

Console login on ubuntu-core-16.04-core-armhf.tar.gz

I'm running ubuntu-core-15.10-core-armhf.tar.gz on a arm evaluation board. Without any change the board boots up ad ask login on ttyPS0 (Started Serial Getty on ttyPS0.). If I try to use ubuntu-core-...
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1answer
58 views

Applications can't connect the X server to launch

I can install and run CLI snap applications without issues, but when trying to run graphical apps it seems they can't connect to the X server, what am I doing wrong? keepassx: cannot connect to X ...
2
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2answers
84 views

How to get information on specific .snap

While beginning to experiment with Snappy Ubuntu Core I find it very difficult to gather information (this might be a general problem, there doesn't seem to be a lot of documentation on the platform ...
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4answers
173 views

Can't install snap after removing it

I'm pretty new to snaps, so I didn't know if it was a bug or if I was missing something. I installed a Snap via "sudo snap install ubuntu-clock-app" then I removed it via "sudo snap remove ubuntu-...
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149 views

Why are there no new Ubuntu (core) Snappy releases?

I'm looking at the image channel guide for developers of Ubuntu Snappy Core. The only release available is 15.04. To me this seems odd; on the desktop and server side there has been a 15.10 and a 16....
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1answer
50 views

How to package a browser plugin and a gui app in a snap package

My app is a gui app (qt) and a browser plugin. The plugin is used only for firefox. When the user clicks a button I want to open my gui-app. I would like to use a snap package to do this, but I can ...
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75 views

Where can I find Ubuntu 14.04 core images?

All the internet points me to here (including the release notes) but the link is broken. Anyone knows where to find it?
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44 views

How to flash Ubuntu-core Snappy on Artik-5 (v 0.5)?

Artik 5 already have an OS fedora 22. I followed the link to boot from SD card, and got success: https://developer.ubuntu.com/en/snappy/start/samsung-artik-iot-modules/ But I cannot flash Ubuntu-core ...
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258 views

How to Upgrade Ubuntu core snappy from 15.04 to 16.04

I have Ubuntu core running on a Raspberry Pi 2 stuck on Linux Porzellangardine 4.2.0-1024-raspi2 #31-Ubuntu SMP Tue Feb 9 11:44:25 UTC 2016 armv7l armv7l armv7l GNU/Linux No LSB modules are available. ...
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83 views

How to use dnsmasq on Ubuntu core snappy

On the snappy store I found dnsmasq which would be useful to access webservers running on lxd. When I installed it, it didin't do any change on the system. When I entered the /apps/dnsmasq-arm.howy ...
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0answers
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Is it possible to run and show the app on a device with snappy core?

The question is as simple as show the app writen for snappy/ubuntu core on a device running snappy/ubuntu core. Like the Raspberry Pi 2. Is this possible or am I better off running Ubuntu Mate on the ...
1
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1answer
452 views

Self hosted Snappy Store

Just like a self-hosted deb repository, is it possible to self-host a Snappy Store for private snapps? I have found that debs can be converted to snapps and that snapps can be submitted to the Ubuntu ...
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1answer
75 views

ubuntu 16.04 snappy core and opening pdf files

Is it possible to have all pdf files open in a snappy core project / application to prevent infection of the main machine OS? If so how? PDf files are increasingly being infected with some type of ...
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48 views

Creating own snap images

I see some similarities between Snap and Docker. I cant find on internet any guide how to create snap image, like image in Docker. How to create it? I want to build snap with some old libs and old app ...
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82 views

installed package with snap - command not available

I saw that tmux is available with snap find and apt-cache. I decided to install with snap. Howto use now tmux? I am normal desktop user, not cloud computing. # snap error: Please specify one ...
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2answers
512 views

What is the difference between a Snappy apps and Charms (and click)

I have heard that the system in use to package and install apps in sandboxes on ubuntu is the click package on the desktopNext and phone/tablet. If I have understood well, a snappy ubuntu core apps, ...
4
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1answer
420 views

How to use snaps via the CLI and GUI?

So, I have upgraded from my 15.10 to 16.04. I have managed to install some snaps, but now I am wondering, how do I launch them? Typing their name in CLI did not help. I tried: ubuntu-core-launcher ...
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1answer
81 views

Where are the Ubuntu Core Snappy images?

So the final release announcement has been made by Canonical but the Ubuntu Snappy Core images are nowhere to be found. Previously they could be found under 15.04 at releases.ubuntu.com now that is ...
2
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1answer
53 views

RTLinux on Ubuntu 14.10 - AMD x64 machine

Can I install a full PREEMPT kernel on Ubuntu 14.10? I've found a lot of tutorials on the web, but none worked for me, 'cause I think they are out of date.
4
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1answer
177 views

Where can Ubuntu snaps write data?

Applications packaged as snaps in Ubuntu are installed (mounted) under the /snap/$SNAPPNAME location. Everything under /snap is mounted as a read-only file system, thus applications cannot write to ...
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2answers
373 views

How to run a command in a snap package

I have read some tutorials about Snapcraft and snappy and I am really excited about it. I am using 16.04 and used snap find to find and install the ubuntu-calculator-app snap. But I don't know how to ...
0
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1answer
62 views

Snappy Ubuntu Core: snap installation doesn't copy files

I created a Docker base image running Snappy Ubuntu Core 15.04 amd64 using the instructions here: http://askubuntu.com/a/577248/495667 (you can get my image from Dockerhub: https://hub.docker.com/r/...
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47 views

Will the new snap package make `Ubuntu Make` obsolete?

Ubuntu Make is a tool to install some latest versions of popular developers tools. At least more recent versions then the repository is offering. It is invaluable for e.g. Arduino IDE. If I ...
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2answers
211 views

How to sideload my own/snapcraft example app?

Just trying snappy for the first time, wanting to develop an app but would obviously want to test it before pushing it to the app store. I've been through the snapcraft tutorial but once you've ...
4
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2answers
106 views

How to build multi-arch snaps

I've got a snap that I'd like to build for multiple architectures. Right now, in the snapcraft.yaml file I define a wrapper as the binary to execute, which sets up environment variables required for ...
2
votes
1answer
442 views

OpenGL error in Snaps Ubuntu 16.04

Snap packages are failing to launch the UI complaining of libGL error: No matching fbConfigs or visuals found libGL error: failed to load driver: swrast Unrecognized OpenGL version Unrecognized ...
2
votes
1answer
113 views

Will a sideloaded snap get upgraded to a newer version in the store?

I grabbed youtube-dl from the snappy-desktop-examples. I then built a snap with snapcraft and installed it: If/when youtube-dl is uploaded to the store, what happens, do I need to explicitly upgrade ...
0
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1answer
184 views

How to install a self-created snap on an Ubuntu Core machine?

I don't understand how the "Snappy workflow" is supposed to work and I feel like I am missing some very basic link. To simplify: Using snapcraft I have created a snap java-hello-world_0_amd64....
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1answer
68 views

Docker on Ubuntu Core - docker.service not found

I am trying to get docker working on Ubuntu core using snappy to install. I am following this guide. My VM is behind a proxy but using http_proxy env settings and sudo -E I seem to be able to get ...