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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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 ...
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Is Ubuntu Core for Raspberry Pi discontiued?

On Frontpage of Ubuntu for Raspberry Pi images Ubuntu Core is missing. But I am sure I used to get Ubuntu Core images from there. Is it discontinued?
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Error when refresh snap package

When refreshing telegram-desktop manually with sudo snap refresh telegram-desktop. The following error appears: Copy snap "telegram-desktop" data 2021-03-25T12:31:17+07:00 ERROR cannot copy ...
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How to deal with “package not found” after trying to install pycrpto and the module that can't be seen

I was trying to run Ubuntu shell on my windows and now I'm stuck with this error when I install pycrypto: Traceback (most recent call last): File "/usr/local/bin/pip", line 5, in <...
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How to update Ubuntu Core 20 ip address?

I just installed Ubuntu Core 20 in a Raspberry Pi 4. I followed all the steps in the Ubuntu tutorial. The network was configured using wifi with a static IP. All settings were entered correctly, ...
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Ubuntu Core on isolated environments

Can Ubuntu Core run effectively in a disconnected environment? (that is, disconnected from the internet). How would one run security updates, software updates, upgrades, etc? We're looking at ...
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Installed wifi-ap snap on Core 18 and immediately lost connection

I installed wifi-ap snap on Core 18 and immediately lost connection. How can I reconnect via ssh? I am hesitant to unplug for fear of corruption. Please see 'snap --help' for app installation and ...
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Unable to view or write to shared Windows Drive

I have mounted a Windows drive using: sudo mount -t cifs -o rw,user=james //share/company/IT/sales /mnt/winshareh/ The user has full admin permissions and can read write etc on the drive itself. If I ...
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Connect Ubuntu core to OpenVPN Server

I'm trying to connect Ubuntu Core 18 to my OpenVPN network. Installing the snap classic package and sudo apt install openvpn, it doesn't works, I can't start openvpn service. With easy-openvpn-server ...
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how to install snapcraft in ubuntu focal armhf schroot deployed on x86 laptop

My ultimate goal is to setup armhf schroot env to build snaps for armhf (32 bit) devices on a x86 host. I managed to do this successfully using sbuild to setup schroot for ubuntu 16 xenial-armhf. I ...
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Using a third party scanner device with ubuntu core on a raspberry pi

I am developing an application that must allow 20-30 remote users from different offices to scan and submit specific documents to a server to be processed. I want to pair a panasonic kv-s1037x with a ...
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After installing Ubuntu core on a Raspberry Pi Compute Module 3, I cannot overwrite with another image

I installed Ubuntu Core on a RPi compute module 3, and after that, I can't overwrite it with another image. After using the rpiboot utility to mount the disk as a local device, I cannot read or write ...
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Ubuntu Core rotate screen Raspberry Pi 3

The display on my Ubuntu Core, latest version (18), on a Raspberry Pi 3 is upside down. The display is connected via the ribbon cable on the Pi, not via HDMI. I first tried via the system snap config (...
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How to mount filesystem of Ubuntu Core

Today my instance of Ubuntu Core crashed completely, and it wont boot anymore. I do not have anything important on it, but I've been strugglig for a while that the machine kept freezing and I had to ...
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Crash log on Ubuntu Core

I'm running Ubuntu Core 18 64-bit on a Raspberry Pi 3+. It happens every now and then that the system freezes and I'm no longer able to access the Pi anymore over the network. The LED on the Pi also ...
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Ubunto Core New Sudoer(Snappy)

Is there any documentation or tutorial on how to create a new user with admin privileges in Ubuntu Core? So far, I can only log in to my Raspberry 4 with Ubuntu Core using only my ubuntu.com account ...
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Ubuntu Core disallows installation and why?

Here I downloaded last week Ubuntu Core for to set it up with Raspberry Pi. At installation Core is demanding my e-mail-address. I typed it, but my address is not accepted ? So I have to break off ...
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Video feed from camera to window. Ubuntu Core 16

I'm currently working with a raspberry pi 3 that's running Ubuntu Core 16, and I have a camera hooked up to the CSI-2 port on the board. I'm trying to display the video from the camera onto a window. ...
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Can't install snap packages on ubuntu 16.04

I have snapd installed on my ubuntu 16.04, but every time i try to install a snap package i get the following error : ~$ sudo snap install hello-world Download snap "ubuntu-core" from ...
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1answer
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Connecting to SSH over the internet on ubuntu-core

I need to communicate with my raspberry pi model 4B over the internet with ssh. However, currently, my ssh connection only works on a local network. How can I make the ssh connection working over the ...
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Change Ubuntu One account associated with Ubuntu Core

I've set up a kiosk device with Ubuntu Core, but now I want to hand it off and have someone else administer it. I don't want their ssh key in my account and I don't want my ssh key associated with ...
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Anyway to manage snap security in Puppet or Ansible?

I understand how to install snaps from the commandline. I can do this with a system configuration tool. But my question is how do I disable certain snaps from being installed, how to prevent certain ...
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Ubuntu Core 18 Image Installation Error Network configuration timed out: please verify settings - NUC10i5FNH

I have been trying to install Ubuntu Core Server by following this tutorial https://ubuntu.com/download/intel-nuc .I am currently stuck on step 7. Right after i press enter to configure the image it ...
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Touch LCD screen for Ubuntu Core on a RPi3?

Does anyone know about a LCD screen that can be used (more or less) out of the box with Ubuntu Core? I wan't to «stay confined». I prefer that it's using SPI or similar attached to the GPIO, and not ...
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List of Ubuntu Snappy Core supported SOM and SOC's

I'd like to find out a complete list of Ubuntu Core supported SOM or SOC's. (Or create one via this question) The ones listed on the Ubuntu website are: Raspberry Pi 2, 3 or 4 (hence also Raspberry ...
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Mount network disk on boot of ubuntu core on Raspberry

I have installed ubuntu core on a raspberry pi 3B + to create a Plex server, what happens is that the files are on a NAS disk connected to the network, which has a username and password to access it. ...
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170 views

Ubuntu Core 18 on RPI4, 8GB RAM

I needed Ubuntu Core 18 on RPI4 with 8GB RAM. I prepared it using Raspberry Pi Imager but neither one of the Ubuntu core works. My question is does Ubuntu Core support PI4. I also tried other versions ...
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Building a custom ubuntu core image for a different architecture

In the docs I read: The ubuntu-image command needs to be run on the same architecture as the target image and needs only the filename of the model assertion to build an image. Does this really mean ...
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Unable to boot Ubuntu Core on a Raspberry PI 3A+

I'm not able to boot Ubuntu Core 18.04 on my Raspberry PI 3A+ (I have two units). The green light (ACL) blinks about 3 to 4 times then the red lights stays solid. There are no messages output (even ...
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How to share a folder/disc on ubuntu core? [duplicate]

I have successed in installing the Ubuntu appliance with Plex on a Raspberry Pi 2. I plugged an external drive to the Pi, and successfully added it to the plex media library. I want to share this ...
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1answer
2k views

Ubuntu 20.04 “Ubuntu Software” tells me there's an update to Core 18

I've been running 20.04 since it came out. Today, the Ubuntu Software app is telling me that there's an update to Core 18 ("Runtime environment based on Ubuntu 18.04"). I don't have a update ...
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How to install libusb-dev in my Ubuntu core in RPI

I have problem in installing libusb-dev in Ubuntu core, so i went for classic and i have done all my stuff with apt. After that i am using paramiko to run my application that is depend on Usblib. When ...
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pi-kernel snap refresh failed

I have a Raspberry Pi 3. I am running ubuntu-core 18 (armhf) on it. The pi-kernel refresh has been failing. I noticed the Error line is related to "Automatically connect eligible plugs and slots ...
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How can I use Python 3.8 in snaps?

As far as I know the only supported Python versions based on base: core18 are python2 and python3. However python3 means Python 3.6. How can I use Python 3.8 in snaps?
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Are there a non-GPL licensed firewall snap for Ubuntu Core?

I was wondering if there is a firewall snap (like the GPL-licensed ufw) which is uncritical w.r.t. usage in a commercial product?
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268 views

Ubuntu Core adding a cifs share

I'm very new to Ubuntu Core and would like to mount a network share to my pi3. Before I would just edit etc/fstab using cifs but when I try to use cifs it gives me an error mount error: cifs ...
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Ubuntu Core on BareMetal

Is anyone using Ubuntu Core on BareMetal or VM? Do you think it is recommended for running Kubernetes nodes? Since Ubuntu Core has Fewer packages to attack, fewer bugs to fix, fewer forced changes; it ...
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Getting Memorry Error while running python script

The script i run is doing a concatenation from GLDAS Netcdf file from 2002 to 2017. but i got error like bellow. File "/usr/local/lib/python3.6/dist-packages/xarray/core/indexing.py", line ...
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Core18: Configure /etc/issue and /etc/motd in custom image

I'd like to give users instructions to log into a web interface via /etc/issue when installing my image, however, the root directory is read only in Ubuntu Core. Is there a clever way this can be done ...
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Dual boot error

so I installed Ubuntu 20.04 LTS and it dual boots with Windows 10 Pro on my laptop. Everything is fine until the point when I switch between the two systems by restarting the computer. The time ...
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Core 18: NetworkManager definitions do not support name globbbing

I'm trying to install core18 with kernel 5.4. Everything boots fine, but when I get into the initial configuration screen and try to set up my networking, I am presented with this error: Network ...
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Core18: Disable serial-getty@.service via install hook

I've got a core18 image with a misbehaving serial-getty@.service that's been a real headache (See here for more info). TL;DR is that it's delaying initial boot by timing out for 10 minutes. Running ...
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1answer
302 views

Ubuntu Core 18: serial-getty@.service keeps timing out, delaying initial boot

I have a custom ARM device that I am trying to enable Core 18 on. serial-getty@ttymxc1.service gets into a failure loop (whereupon it times out starting the service for 90 seconds, then tries to start ...
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Unable to boot Ubuntu Snappy Daemon issue

Recently I install kubernetes on my device and everything was fine until I turned off my laptop but when I turn it on again it is unable to boot and keep running and endless to like shown in the ...
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1answer
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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 ...
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hciattach /dev/ttyAMA0 permission denided on Raspberry Pi 3B running Ubuntu Core 18

I have been trying to set up bluetooth on Ubuntu Core 18 for my appliation-snap. The device is Raspberry Pi 3B v1.2. I have trouble getting Bluetooth to work. Specifically, when I tried to execute '...
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What will happen if we put the ubuntu installed disk from lenovo into dell?

I installed ubuntu 20.04 on my samsung ssd which was in lenovo thinkpad yoga 4th gen. Now I've changed my laptop and I remove ssd from Lenovo and pit it into dell latitude e5470 6th gen. Laptop. Now,...
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Ubuntu Core - Server + Nextcloud?

I have a question about Ubuntu Core. Somehow I managed to install Ubuntu Core 16 with Raspberry Pi 2 and install my own Nextcloud instance connected to the internet with a private Domain at home. I am ...
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1answer
648 views

Connect to Raspberry Pi 4 with Ubuntu Core 18 via serial cable

I am trying to install Ubuntu Core 18 on my Raspberry Pi 4 by following this guide. I don't have an extra keyboard or a USB-C connector to a screen. The guide says: Attach the monitor and keyboard ...
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1answer
367 views

where does snap store user data for apps that have been removed

I've uninstalled a snap app using "ubuntu softwares" and it removed all my relevant user data from /home/$USER/snap/appname as I've heard snap makes a snapshot of this data before removing it. Since ...

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