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

learn more… | top users | synonyms (1)

56
votes
2answers
30k views

What is Snappy Ubuntu Core?

Before everyone rushes to mark this as a duplicate, I have indeed read the other threads here and here, googled this, and visited the snappy homepage here searching to clear my confusion, and I couldn'...
14
votes
2answers
12k views

What commands are needed to install Ubuntu Core?

Ubuntu Core's wiki page page contains the instructions to install Ubuntu Core on a target media: Uncompress (do not unpack) rootfs Format target media: at least one partition should be ext2, ...
14
votes
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 ...
13
votes
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. ...
12
votes
1answer
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....
10
votes
2answers
817 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....
8
votes
2answers
271 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
8
votes
2answers
930 views

How can I run a Snappy / ubuntu-core image with LXD

I would like to run Ubuntu Snappy in an LXC container. There isn't an existing snappy image at the default https://images.linuxcontainers.org repo, but I was wondering if this is something others ...
7
votes
1answer
664 views

Can I run Snappy Ubuntu Core as a guest inside Docker?

I'm aware that Snappy Ubuntu can host Docker containers. My question is whether it can also be run inside a container, as a Docker guest. The reason I'm asking is that I can't find any Snappy VM ...
6
votes
2answers
3k views

Packages for Ubuntu Core Snappy

How can I find out what packagges are available for Ubuntu Core? I've googled everything, but I can't seem to find a website like packages.ubuntu.com for Core.
6
votes
1answer
6k views

How do you compare Ubuntu Server to Snappy Ubuntu Core?

How do you compare Ubuntu Server to Snappy Ubuntu Core for a single-board computer (SBC)? From what I've read I understand that the package managing system is different in Snappy. But, in general ...
6
votes
1answer
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 ...
6
votes
1answer
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 ...
6
votes
1answer
570 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 ...
6
votes
3answers
3k views

Snappy Ubuntu Core, no Docker or Owncloud in 'store'

I downloaded the image of Snappy Ubuntu Core for the Beaglebone Black, Alpha 2. When I now try to install Docker or Owncloud it cannot be found. Nor are the apps/framework available through the WebDM '...
5
votes
1answer
82 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?
5
votes
1answer
9k views

How to connect wifi network from raspberry pi 2 (snappy)

I've set up new raspberry pi 2 with snappy core. And I couldn't find how to connect wifi network from snappy terminal. My wifi dongle working correctly but there is no iwconfig in snappy core. Wlist ...
4
votes
5answers
6k views

How to install snappy Ubuntu 15.04 Core images on a PC

Can you please help with some instructions on how to install Snappy Ubuntu core on an AMD64 PC? I can find the image at this URL. But I've not been successful installing booting it of an USB and ...
4
votes
1answer
176 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 ...
4
votes
1answer
75 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?
4
votes
1answer
1k views

Ubuntu-Core Snappy ssl-certificate error

yesterday i was testing the new ubuntu core image for the raspberry pi 2. Everything started perfectly but i got an ssl-certificate error for every snappy command i wanted to execute. Internet ...
4
votes
2answers
379 views

Play audio on Ubuntu Core!

I installed Ubuntu Core 14.04 AMD 64. Now I want to play an audio! What exactly should be installed?! (I got this message on webkitgtk: jack server is not running or cannot be started) I got this by ...
4
votes
1answer
417 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 ...
4
votes
2answers
104 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 ...
4
votes
2answers
3k views

Is there a way to add repo to Snappy ubuntu core?

I am trying to install more stuff and I am seeing very little in snappy's install. Is there a way to use apt-get or add repositories to install?
4
votes
1answer
36 views

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?
4
votes
2answers
1k views

snappy ubuntu core install basic packages

How to install basic package on snappy Ubuntu core, like nano git wget etc. I tried the dpkg -i ***.deb ,but there are also need some dependent packages
4
votes
2answers
843 views

where is the 32 bit ubuntu snappy core image

The Ubuntu Website states that Ubuntu Core is Now available on a wide range of 32 and 64-bit ARM and X86 platforms. The following page says 64-bit PC (AMD64) snappy image Choose this to ...
4
votes
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 ...
3
votes
2answers
118 views

Are Click packages obsoleted by Snappy packages?

Are Click packages obsoleted by Snappy packages? Should I focus on learning how to make snappy packages, and ignore the click documentation?
3
votes
1answer
966 views

What is Ubuntu Core? [duplicate]

What exactly is Ubuntu Core, and how does it relate to Ubuntu itself (i.e. the main desktop and server distribution)? I've read the answer to this question, which says it's just a minimal install of ...
3
votes
1answer
602 views

What is meant by 'Transactional Updates'

What is meant by 'transactionally updated' system and how does such an update process different from a 'normally' updated system? What are its advantages/disadvantages? Are there any other Linux ...
3
votes
2answers
807 views

Supercomputer from old computers [closed]

I have many computers sitting around. A netbook A laptop A desktop And another Desktop I was wondering if there is any software that is capable of taking the processing power of the computers ...
3
votes
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, ...
3
votes
1answer
2k views

Unable to connect to Snappy Ubuntu Core via ssh [closed]

I have installed the Snappy Ubuntu Core alpha using KVM, but cannot connect to it using SSH. SSH returns ssh_exchange_identification: read: Connection reset by peer, which seems like a server-side ...
3
votes
2answers
5k views

How can I install Cinnamon on a minimal CLI installation?

I've come across similar, already answered questions on this website; however none of them deals with starting from the scratch - the Ubuntu core. The normal release of 12.04 was not responding well ...
3
votes
1answer
56 views

What is the difference between +bbb and -bbb images in the 15.04 release?

In the stable 15.04 release here, there are two files for BeagleBoneBlack to download: ubuntu-15.04-snappy-armhf+bbb.img.xz and ubuntu-15.04-snappy-armhf-bbb.img.xz They have the same size, but the ...
3
votes
2answers
2k views

Ubuntu Core Snappy Touch GUI app kiosk

I just learned about Ubuntu Core Snappy about 2 hours ago. I was very excited as I was thinking about making a stand alone java application that has a simple full screen touch GUI. This would be a ...
3
votes
1answer
252 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.
3
votes
1answer
189 views

How to create local repository for Ubuntu Snappy

How to create local repository for Ubuntu Snappy? For example I use reprepro to create Ubuntu repository for deb packages.
3
votes
1answer
85 views

Trouble booting Snappy on Raspberry Pi 2

I have installed Ubuntu Core Snappy (ubuntu-15.04-snappy-armhf-raspi2.img) on a miniSD card following the [official instructions1]. Everything went fine with no error and the miniSD has 3 partitions ...
2
votes
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-...
2
votes
2answers
369 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 ...
2
votes
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:/...
2
votes
1answer
200 views

What is the recommended way to install pip on Snappy Ubuntu Core?

I would like to provision Docker running on Ubuntu Core with Ansible. For that I need to get docker-py on the machine. Snappy already comes with Python installed, but pip is not provided. Running the ...
2
votes
1answer
118 views

How to copy source files into stage/snap with snapcraft

I'm trying to create a snapp from an app host on github (etherpad-lite). When I launch the snapcraft stage command, snapcraft downloads all the files into the parts/etherpad-lite/src folder and then ...
2
votes
1answer
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:...
2
votes
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
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 ...
2
votes
1answer
47 views

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.