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 turn off Ubuntu Core login prompt tty

Is there a way to disable the login prompt after Ubuntu Core boot? The tty1 login prompt. I am running Ubuntu Frame. The login appears after boot, the ubuntu frame renders a few seconds after the ...
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Does Canonical provide rootfs tarballs for Ubuntu Core anymore?

We used to find recent builds at https://partner-images.canonical.com/core/ but that last build available there now is from June of 2023. Since then, I would have expected newer versions to have been ...
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Ubuntu Appliance RaspPi4b Firmware- Keyboard & Mouse Don't Work

I am trying to install the Adguard Home Ubuntu Appliance image on an SD card to boot on a raspberry pi 4b. In the beginning it didn't boot up, so I fixed it by manually modifying both the start4.elf ...
Matt's user avatar
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Costly File Modification Ubuntu 20.04

Sadly, when I was very new, I misunderstood what CORE was and downloaded 18, 20, and 22 on my desktop. As I grew more knowledgeable, I realized they were for IoT applications and NOT my desktop. I ...
Merlin's user avatar
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Getting Ubuntu Core Mir-Kiosk to pass login credentials

I'm trying to build a Zabbix NOC-type display screen for our office on a Raspberry Pi 3, using Ubuntu Core 22, and the ubuntu-frame and wpe-webkit-mir-kiosk snaps, per the info here - https://...
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Issue installing Canonical Livepatch - Error Message

I am facing an issue while trying to install Canonical Livepatch on my Ubuntu system. The error message I am encountering is as follows: $ sudo snap install canonical-livepatch error: cannot perform ...
Aarón Más's user avatar
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Ubuntu frame does not detect screen changes

I have a problem. Im trying to run my apps in ubuntu-core using ubuntu-frame. But in some cases I have problems with my screens. My environment is: A normal PC with ubuntu core 22 and a video card ...
afc's user avatar
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Ubuntu-core from PXE?

Problem in a few words... I'm working with ubuntu-core22 and have to deploy a lot of computers with my custom OS. (ubuntu-core with my snaps). I created my own PXE server. To make some test I install ...
japseabery's user avatar
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wpe-webkit-mir-kiosk Network Disconnect Unrecoverable

I am using wpe-webkit-mir-kiosk on Ubuntu Core 22 on a raspberry pi 3b like the following: snap set wpe-webkit-mir-kiosk url=https://www.mysite.com My use case is a digital dashboard that loads a ...
Justin's user avatar
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Ubuntu-Image fails to build image

I am using Ubuntu-Image to build an image for ubuntu with several snaps as outlined here: https://ubuntu.com/core/docs/using-ubuntu-image I have been able to build images without issue for a while now,...
thepenguinmaster's user avatar
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Build custom kernel snap for Ubuntu Core 22

The goal is to use Ubuntu Core 22 on IoT devices as a base. I need to include a custom proprietary driver as kernel module. I tried the following guide Building a kernel snap but this seems to target ...
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Unable to run ubuntu-frame in Hyper-V on Windows 10

I'm attempting to run ubuntu-frame through Windows virtualization as I have on physical hardware (NUC). However, for both Ubuntu Core-22 and Ubuntu 22.04 LTS (server), ubuntu-frame fails to start ...
Ray Smith's user avatar
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Trouble SSHing into Raspberry Pi with Passwordless SSH Key on Ubuntu Core 20

I have successfully created a bootable Ubuntu Core 20 SD card using Raspberry Pi Imager. I generated an SSH key using PuTTY Key Generator without a password and added it to my Ubuntu account's SSH key ...
Avishek's user avatar
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cannot write a remotely mounted file

Before opening my nextcloud server to the internet i'm trying to harden its security by configuring its sshd_config file. Its a ubuntu core server so i can edit files only through sshfs. The thing is, ...
Lorenzo_Kospecz's user avatar
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Snap binary override by binary placed in /snap/bin

I moved a geckodriver binary to the /snap/bin directory. Now, after a reboot, my snap binary isn't working, and it seems that the geckodriver override the binary. Now with more details: Basically I ...
ivarejao's user avatar
1 vote
1 answer
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Ubuntu Core 22 installation stuck on raspberry pi4 B

My Raspberry Pi 4 is stuck at this point while installing Ubuntu Core 22 as shown in the attached image. I waited for about 2 hours, but cannot see any progress. I wrote the Ubuntu Core image using ...
samim09me's user avatar
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Can't attach canonical-livepatch with my token

I just successfully installed and configured an Ubuntu Core 18 image for Intel Dawson Canyon and June Canyon NUC by following this official guide to run (mainly) my Nextcloud instance. The choice of ...
cm-t's user avatar
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Learning how to use Snapcraft

I have started a project to create handy network sensor that can be deployed in locations where physical security may be lax/ non-existent. The goal is to design a device that uses Ubuntu Core for (...
Geekzy's user avatar
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username/password for ubuntu cloud image in virtualbox

I have downloaded ubuntu cloud 22.04 ova image from below link and started the same in virtualbox 7 https://cloud-images.ubuntu.com/jammy/current/ On boot up it asks for username/password as shown ...
codingfreak's user avatar
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Provide self-signed SSL certificate for first boot of Ubuntu Core 20 on KVM

I want to try out Ubuntu Core 20 on KVM, running on my Ubuntu 22.04.2 LTS Desktop. I am in my company network which means I need to use a self-signed SSL certificate in order to login with my app ...
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Ubuntu core - Difference between snap set and direct change in filesystem

Ubuntu core has some configuration options. I do not understand what is the difference when I configure system through this "snap set" or directly in /etc folder? (e.g. netplan can be ...
Karel DevOps's user avatar
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Ubuntu-Core Desktop/Raspberry Pi

I have "snapped" Core22-desktop to an RPI but how is is executed?
James R Owens's user avatar
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1 answer
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Ubuntu-Core Password

So, I believe I had done everything correctly as outlined in the following: ssh-keygen to create private and public keys in ~/user/.ssh, id-rsa and id_rsa.pub files created. Password was created for ...
James R Owens's user avatar
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Ubuntu-Core Profile Screen

Complete profile screen: I have partially installed Ubuntu Core and have registered my email with Ubuntu. But now I am at a screen to complete the profile. Searching for a solution has been ...
James R Owens's user avatar
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Lost SSH access to ubuntu snappy core

I have ubuntu snappy core installed on my dragonboard. I set it up using SSO. It worked fine to ssh to the dragonboard from the desktop computer with ssh keys and no password. Suddenly after years, ...
E Wu's user avatar
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Can I use Nvidia GPU on ubuntu-core-22 and use ubuntu-frame for display?

I have a computer with an Nvidia GT 1030 graphics card, and I'm trying to use ubuntu-frame to display a simple website. Initially, the prompt is displayed without any issues. However, when I attempt ...
Aurélien SEMENCE's user avatar
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Does Ubuntu Core support LVM?

My initial try at Ubuntu Core got me surprised by the lack of LVM (Logical Volume Manager) commands. The Snap store doesn't seem to have anything either.
minidou's user avatar
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Ubuntu Core 20 won't boot on amd64 machine

I'm trying to install Ubuntu Core 20 (custom model) on a Dell Wyse 3030LT box, but I'm having trouble booting it. I can boot Ubuntu Desktop fine to write the image to the machine's internal storage, ...
grantonthenet's user avatar
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1 answer
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Web server on Ubuntu core 22

I started development for ubuntu core. I want to host my php web app on the ubuntu core. The problem is that it is snap based OS an I can't install apache2 and other packages what i need to host my ...
Grabowsky's user avatar
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Ubuntu Core 22 64 bit - Raspberry Pi 4 - SSD boot loop (full Ubuntu boots fine)

I'm using Raspberry Pi imager to write the provided images to SDCard/HD/SSD Raspberry Pi 4 eeprom is upgraded to the latest version, and no sdcard is present during the issue. Booting Ubnt Core 22 ...
rvf148's user avatar
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Installed ubuntu-frame with wpe-webkit-mir-kiosk and only get a gray screen

I followed the (relatively simple) instructions in official documentation to install a web kiosk on a ubuntu-core 22 raspberry pi4. I only get a gray image and can't set the website to display. It ...
laxamar's user avatar
1 vote
0 answers
85 views

Unable to ssh into ubuntu core on NUC

I have installed Ubuntu Core (ubuntu-core-22-amd64.img.xz) on a NUC. Using these instructions: https://ubuntu.com/core/docs/install-nuc. When I get the screen, which is similar to when I have ...
runningraptor's user avatar
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71 views

Error finding matching public key for signature with ubuntu-image device

I am following the tutorial for creating a Ubuntu Core image on the Ubuntu website and getting an error. Here is the link to the instructions: https://ubuntu.com/core/docs/create-model-assertion The ...
Kris's user avatar
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How do I copy firmware to /lib/firmware in Ubuntu Core 22 LTS?

My problem is with Ubuntu Core 22 LTS. It's running on my rasp3b+ with tvheadend. My terratec h7 needs a firmware file that I have on hand. My problem is that I can't copy the firmware file to `/lib/...
david tober's user avatar
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How to build Snap including multiple directories and files in Snapcraft.yaml

Is there a example in https://github.com/snapcrafters that would show how to add multiple directories and files as part of the snapcraft build? I have an entire directory tree that would need to be ...
Kris's user avatar
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1 answer
655 views

How to perform unattended install of Ubuntu Core from USB flash drive

There is a way to setup Ubuntu Server unattended install by creating a custom ISO file with instructions in preseed and programming this on a USB flash drive to install Ubuntu Server on a industrial ...
Kris's user avatar
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1 vote
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How to install Ubuntu Core (2 versions) into separated hard drives

I want to install 2 Ubuntu core distributions to 2 separated hard drives in one PC. I tried but there is only one distribution shown in the boot sequence menu. How can we change the file /boot/grub/...
learning_core's user avatar
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1 answer
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How to force synchronization of SSH autherized keys from Ubuntu One account to Ubuntu Core IoT device

I added a few more SSH keys to the Ubuntu One account (https://login.ubuntu.com/ssh-key). Now, I want to make sure that these key are now sent down to the IoT devices that have Ubuntu Core installed ...
Kris's user avatar
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1 answer
168 views

Error using pciutils.lspci on Ubuntu Core

I have installed Ubuntu Core on a IoT device and I am going through a number of steps to figure out why a cellular modem is not being detected on it with modem manager. I want to run the lspci command,...
Kris's user avatar
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Docker permission errors on Ubuntu Core

After installing Docker Snap on Ubuntu Core I can build and run Docker containers. However, I'm forced to use sudo for all the Docker commands, otherwise I get the following error: user@ubuntu:~$ ...
Kris's user avatar
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1 answer
325 views

What is the implementation of Docker on Ubuntu Core in terms of Snap sandbox instance [closed]

I installed the Docker Snap on Ubuntu Core using the following commands: sudo snap install docker I have been able to create create a Dockerfile and a docker-compose.yaml file to build a image using ...
Kris's user avatar
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1 answer
725 views

Is Ubuntu Core 22.04.1 Real Time not avaliable for personal use?

I've recently deployed the Ubuntu Core 22 Real time OS into a raspberry pi 4 in order to deploy an application using the real time feature they announced recently. When I run $uname -a I can not see ...
Domenec's user avatar
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When SSHed into Ubuntu Core how to know which container running from

I setup a Ubuntu Core 22 IoT device and I was able to SSH into it. Since Ubuntu Core is a container operating system ,I wanted to know if I am SSHed into the device which container is my SSH session ...
Kris's user avatar
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Is an Ubuntu One account necessary for Ubuntu Core?

I have been installing both Ubuntu Server 22 and Ubuntu Core 22 over the last two months in order to learn more details about it. One of the main difference I see is that when I install Ubuntu Core it ...
Kris's user avatar
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Ubunto Core 22.04 Raspberry pi - linux-modules-extra-raspi

I have Ubuntu Core on a raspberry pi 4 and installed microk8s via snap. I see regular errors in calico: "panic: runtime error: invalid memory address or nil pointer dereference" A bit of ...
Nokes's user avatar
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Ubuntu Core and Docker like networking

Does Ubuntu Core and Snaps (containers) allow for the flexibility that Docker networking allows, such as: default docker bridge user defined bridge deploying containers to host networking MACVLANs (...
Kris's user avatar
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3 votes
0 answers
211 views

Ubuntu Core on Raspberry Pi 4 Install Configuration Too Fast

I'm trying to install Ubuntu Core 22 (and I tried 20 as well) on a Raspberry Pi 4, but am being faced with a super fast reset on the install configuration console. I have about 5 seconds after the ...
Becki True's user avatar
2 votes
0 answers
214 views

Ubuntu Core 20 Nano: Premission Denied

I have been trying to get nano to work, but I keep running into permission denied problems where vim (vi) works. I have downloaded 2 versions of nano sudo snap install nano-strict following this guide:...
Tomas Berger's user avatar
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1 answer
149 views

Ubuntu Core viewing all IoT onboarded devices

I installed Ubuntu Core 20 and Ubuntu Core 22 on two separate devices on my network. I can SSH into these devices easily. Before this I setup a Ubuntu One account and uploaded an SSH key. From ...
Kris's user avatar
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2 votes
2 answers
110 views

Find device Ubuntu Core 20 image to reinstall

I am using a device that is the Lenovo ThinkEdge SE30. It came with Ubuntu Core 20. I want to reinstall this image on the device. When I check the properties of it I see the following: The "...
Kris's user avatar
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