Questions tagged [ubuntu-core]

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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How can I update all Snap packages?

I know that I can update a snap package using sudo snap refresh <package> But is there a way to update all snaps, like sudo apt dist-upgrade
Alejandro Vera's user avatar
225 votes
4 answers
106k views

Why is Ubuntu moving to Snap packages?

Why Ubuntu dumping .deb packages and moving to .snap packages? At least for now they are keeping .deb package for normal distributions. .deb is already the most popular packaging format out there. ...
Vishnudev K's user avatar
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89 votes
2 answers
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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'...
ste_kwr's user avatar
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38 votes
1 answer
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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 ...
David Planella's user avatar
21 votes
2 answers
20k 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, ...
Oxwivi's user avatar
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1 answer
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What does Ubuntu Core consist of?

Exactly what does Ubuntu Core consist of? I know of a similar project called Ubuntu Mini Remix, which, while not an official Ubuntu project, is known to contain: ubuntu-minimal metapackage ubuntu-...
Nickolai Leschov's user avatar
34 votes
4 answers
59k views

How to start 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 ...
Alejandro Vera's user avatar
6 votes
4 answers
2k views

Is Snappy Core available for Raspberry Pi 3/4?

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.
jsejcksn's user avatar
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85 votes
3 answers
119k views

How to remove uninstalled snaps from cache?

When I install a snap with snap install <SNAPNAME> then it is being downloaded and mounted. When I remove it with snap remove <SNAPNAME> then 'everything' is being deleted like the snap, ...
Emil Engler's user avatar
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11 votes
1 answer
12k 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:...
David Planella's user avatar
7 votes
1 answer
4k 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 ...
Mario Kamenjak's user avatar
6 votes
1 answer
3k 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 ...
Fern Moss's user avatar
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5 votes
8 answers
33k views

How do I login to Ubuntu Core?

I just configured Ubuntu Core on my Raspberry Pi 3 and now it is now asking for a user name and password in the terminal (I think). It says: Ubuntu Core 16 on <my ip address> (ttyl) localhost ...
BUSH's user avatar
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128 votes
1 answer
88k views

what's the main difference between Docker and Snap?

In recent c't (sadly paywalled) there is an article about Snap and Flatpak. This sounds very similar to Docker, lots of concepts are the same. Now my question what's the difference between Snap and ...
Sybil's user avatar
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31 votes
3 answers
15k views

Old Ubuntu core snap versions are filling up disk space

I am running Ubuntu 16.10 with snapd and the basic core snap installed since it was released. After some time I observed that the /snap/core directory fills up with multiple older versions. To remove ...
cl-netbox's user avatar
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21 votes
2 answers
165k views

Set static IP on Ubuntu Core

I'm new to Ubuntu Core. On first login I selected the option: Will use DHCP for IPv4 Now I'd like to change my machine to use a static IP to be easier to log in remotely. I ran sudo console-conf ...
tsteiner's user avatar
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19 votes
2 answers
7k 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....
Nathan Basanese's user avatar
12 votes
1 answer
22k views

Connecting to new Wifi network

I am using Ubuntu Core on the Intel Joule. I went through all of the setup and everything was fine. I connected to a wifi network and am able to SSH into the Joule. However, we just set up a new wifi ...
eab's user avatar
  • 135
10 votes
1 answer
1k 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 ...
Todd Booth's user avatar
10 votes
2 answers
22k views

Install applications in Ubuntu core

I installed Ubuntu Core and found that it used Snap for application installation. I want to install many applications on this system such as firefox, chrome, and many more. How can I do it? And is it ...
Ashish Sultania's user avatar
7 votes
2 answers
11k views

Difference between Ubuntu Base, Core, Minimal

Is there a simple explanation of the differences or use cases of the three versions mentioned? I need a secure digital system whith python support, internet access which only shows a browser. It ...
Findus's user avatar
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6 votes
1 answer
994 views

Unable to install ubuntu snap in 16.04 LTS

I'm unable to install snap in Ubuntu 16.04, instead, I get the error shown below: dheer@dheer-Inspiron-3558:~$ sudo snap install notes [sudo] password for dheer: ********* error: cannot perform ...
Dheer Man's user avatar
3 votes
2 answers
9k 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 ...
BhaveshDiwan's user avatar
2 votes
1 answer
9k views

Ubuntu CORE SSH key

I have the same problem as describe in the SSH to a login to Ubuntu Core on Raspberry Pi requires password. I create a SSH key with Ubuntu MATE 16.04 installed on a VirtualBox VM The key was created ...
Foxrider83's user avatar
2 votes
2 answers
3k views

Livepatch enable not found?

machine is running Xenial, updated from Wily using do-dist-upgrade Trying to set up live patching as an experiment before apply to my seedbox (a different machine) Following these instructions ...
user avatar
2 votes
1 answer
3k views

How do I flash Snappy Ubuntu Core onto a BeagleBone Black's eMMC?

I have successfully followed the instructions under Snappy: Getting started with a Beaglebone Black and currently my BeagleBone Black always boots Ubuntu Core from the microSD card. Is it possible to ...
Spyros Maniatopoulos's user avatar
2 votes
1 answer
1k views

How do you manage journald log history on ubuntu core 16

I need to change the default configuration of journald on Ubuntu Core 16 so that I can see docker daemon logs from previous boots. However, /etc/systemd/journald.conf is on a read-only file system, ...
Steven Velez's user avatar
1 vote
3 answers
8k views

Cannot locate base snap core20: No such file or directory

I have been trying to run firefox but everytime i try to run it through the terminal commands, it shows "cannot locate base snap core20: No such file or diretory". I tried removing and ...
Sukrati Saxena's user avatar
15 votes
1 answer
7k 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....
David Planella's user avatar
15 votes
1 answer
25k 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 ...
João M. S. Silva's user avatar
14 votes
2 answers
6k views

How to install Snappy Ubuntu Core without a keyboard

I bought a raspberry pi 3 to use as a server, and only after getting part way through the Ubuntu Core installation instructions did I realise that I actually don't own a USB keyboard... (we're a ...
Felix's user avatar
  • 453
13 votes
1 answer
18k views

Can't remove core18 snap

I am cleaning up my fresh Ubuntu 20.04 install and I can't seem to remove core18 snap. $ snap list Name Version Rev Tracking Publisher Notes core18 20200427 1754 latest/stable ...
oᴉɹǝɥɔ's user avatar
13 votes
1 answer
7k views

How do I 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 ...
David Planella's user avatar
12 votes
1 answer
13k 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?
David Planella's user avatar
10 votes
3 answers
19k 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 ...
Kim Seokjun's user avatar
10 votes
1 answer
871 views

How can I iterate more quickly when creating a snap?

I am working on a snap of a bigger piece of software and building the snap, removing the old one, installing the new one just takes a very long time. I would like to iterate over creating the snap ...
dholbach's user avatar
  • 1,713
10 votes
1 answer
4k 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?
Ron's user avatar
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9 votes
1 answer
1k views

Disable Ubuntu Core Autoupdate

Ubuntu Core automatically updates installed snaps, for example 'core' snap, and to return to previous version I need to run the command snap revert But I want to control this myself and update ...
Andrey Germanov's user avatar
8 votes
1 answer
57k views

GUI to Control fanspeed in Ubuntu?

is there any GUI Software to control fanspeeds in Ubuntu 18.04?
karthik oggu's user avatar
8 votes
2 answers
2k views

Prevent automatic reboot after Ubuntu Core update on 16.xx

As documented here, if there is a core update, the computer will automatically update, then reboot. I wish to have automatic updates on, but do not wish to have the machine automatically reboot. Is ...
Magneon's user avatar
  • 183
7 votes
1 answer
2k views

Can't login to Ubuntu Core 16 using a second ssh key

I just installed Ubuntu Core 16 on a Raspberry Pi 2. Before install, I uploaded my ssh key for one of my computers to my Ubuntu SSO account. After installation I had no problems connecting to the Pi ...
popstr's user avatar
  • 173
7 votes
3 answers
6k 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?
vatsa's user avatar
  • 73
7 votes
1 answer
908 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 ...
meta221's user avatar
  • 325
4 votes
0 answers
419 views

Allowing Firefox installed through Snap to associate links with non snap programs

I have just moved to Ubuntu 18.04 and am giving snaps a try, and so have set up Firefox as a snap package. Now I am trying to associate magnet links with my torrent client. I am however unable to let ...
Hrafn's user avatar
  • 231
4 votes
3 answers
6k views

Unmet dependencies installing vim or vim-tiny

I am trying to install vi and vim I initially had vi instlled, and could not install vim, then I removed vi, and now I cannot install both. I watch all threads in internet, that says you should ...
Juliatzin del Toro's user avatar
4 votes
3 answers
3k views

How to get snappy enable-classic?

Great talk by Sergio Schvezov at Ubucon Pasadena today - he demod a temporary way around the read-only file system (apparently a form of containerising) $ snappy enable-classic I'm just running in ...
r4space's user avatar
  • 110
4 votes
2 answers
215 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?
Anon's user avatar
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4 votes
1 answer
599 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 ...
Anon's user avatar
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4 votes
2 answers
582 views

Is it possible to install LXD directly on a Ubuntu Snappy Core?

I'm running a Ubuntu Snappy Core (2015-04-28, version 45). I want to install LXD directly on the snappy host. Is this possible? Thx! --todd
Todd Booth's user avatar
4 votes
1 answer
13k views

Cannot find Bluetooth device - Ubuntu Core on Raspberry PI 3 B+

I don't see any bluetooth devices when I install the bluez snap and use either hcitool which results in nothing: $ sudo hcitool dev Devices: $ or bluetoothctl: $ sudo bluetoothctl Agent registered [...
Srihari's user avatar
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