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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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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Ubuntu Snappy XAMPP Pi2

Is there a way to install xampp in Ubuntu snappy 14.04 Raspberry Pi 2?
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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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78 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
58 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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92 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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106 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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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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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 ...
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1answer
93 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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47 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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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

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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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 ...
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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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2answers
49 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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156 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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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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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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1answer
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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280 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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4answers
176 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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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 ...
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422 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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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 ...
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447 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 ...
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2answers
380 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 ...
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1answer
70 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 ...
3
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1answer
265 views

Is Snappy Core available for Raspberry Pi 3?

If it's available, I can't seem to find it on the site. If it's not, can someone please link me to as much information as possible so that I can track progress on developments? Thanks.
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2answers
109 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 ...
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1answer
259 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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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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96 views

Let's encrypt on Ubuntu Snappy

Just got my first Ubuntu Snappy running on a Raspberry Pi 2 and would very much like to enjoy Let's encrypt on it. I got it working on my other web server, but feel that this might not apply on Snappy ...
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Do the ubuntu core/snappy images have checksums/hashes?

It's not at all clear from the site. How are you supposed to reason about security if the base OS images aren't authenticated?
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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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1answer
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How do I set up a cron job on Snappy?

If I run sudo crontab -e I can edit the crontab, but it's read-only so nothing gets saved.
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71 views

Migrate owncloud data+db to Ubuntu Snappy?

I'm about to get my hands on a Pioneer Raspberry Pi drive running Owncloud 9 on Ubuntu Snappy 16.04. I want to move my old owncloud instance to this new device, I just don't know how. Currently I'm ...
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51 views

How to stop my from Server crashing: mpm_prefork:error and coredumps (used gbd)

I have a WP website on an Amazon AWS Ubuntu server and the website keeps crashing, I think it happens when having a lot of traffic. This is what I get the most of in /var/log/syslog file: Apr 5 ...
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194 views

PHP Warning:fread(): SSL: Connection reset by peer in /var/www/html/wp-includes/class-wp-http-streams.php line 269

I have a WP website on an Amazon AWS Ubuntu server and the website keeps crashing, I think it happens when having a lot of traffic. This is the error I get as an output: ` [Mon Apr 04 00:13:56....
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Raspberry Pi 2 no boot with Snappy Ubuntu

I have a Raspberry Pi 2 B. I downloaded Snappy Ubuntu Core (ubuntu-15.04-snappy-armhf-raspi2.img.xz) from the official site, extracted the archive, and then wrote the image to an 8GB SDHC card using ...
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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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1answer
65 views

Ubuntu core 14.04 image

Is there anywhere Ubuntu Core 14.04 armhf image for BeagleBone Black to download. I found many tar.gz files but that are filesystems only. I am looking for img file. I have many problems with Snappy ...
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85 views

Oracle JDk 8 in Snapcraft App with Maven

I have a maven project which has source and target versions as JDK 1.8. And I wanted to build a snap app for the same project. As per the doc it looks like snapcraft "will pull a relocatable OpenJDK ...
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1answer
57 views

How to install snapcraft in a BBB running snappy 15.04?

When I try to install snapcraft is that occurs: (BeagleBoneBlack)ubuntu@localhost:~$ sudo snappy install snapcraft Installing snapcraft snapcraft failed to install: snappy package not found
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Ubuntu Snappy can't detect USB

I have Ubuntu Snappy installed on my device (raspberry pi 2 B+) but snappy doesn't detect my USB wifi. $ sudo lsusb sudo: lsusb: command not found So I checked the PCI $ sudo lspci sudo: lspci: ...
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1answer
107 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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Can't boot Snappy from SD card on Beaglebone Black!

I've downloaded snappy image to Beaglebone Black: ubuntu-15.04-snappy-armhf-bbb.img.xz. I wrote the image to an SD card, I booted Beaglebone from the SD card, but I can't find the Beaglebone in my ...