Raspberry, Ubuntu and Megatools

To install megtools (command line utilities for Mega.nz), in your raspberry with ubuntu installed follow the steps below (thanks to the instructions from here: https://www.instructables.com/id/Descarga-archivos-de-Mega-con-Raspberry-Pi/)

  • Install the necessary packages

You may also need to add some additional packages if there is an error about the documentation.

  • Get the latest source code from https://megatools.megous.com
  • Compile and install them
  • Add your Mega account credentials in ~/.megarc like:
  • use the mega tools commands (megacopy, megals, megaget etc.

Erlang and Elixir with asdf in Raspberry 4 with Ubuntu 20.04

To install the latest/current versions of erlang (23.0.2) and elixir (1.10.3), follow the instructions below:

Install asdf ( full instructions https://asdf-vm.com/#/core-manage-asdf-vm):

Add the following two lines in your ~/.bashrc file:

Reload/Source your bash file with

Install the erlang plugin

If you get the following warnings:

Install the missing packages:

Install latest erlang version:

Set it up globally (if you want):

Add elixir plugin:

Install latest elixir version (1.10.3):

Set it up globally:

Finally you can also install the latest Phoenix version (1.5.3):

WiFi, Raspberry Pi 4 B, Ubuntu 20.04

After installing an image of the Ubuntu server on the Raspberry 4, the wifi is not automatically configured after the initial book.

In order to be able to use the WiFi follow the steps described below for setting up your wifi in your SD card, and then reboot your raspberry (make sure that the indentation in the yaml file is correct, and also your WiFi access point is enclosed in quotes):

https://ubuntu.com/tutorials/how-to-install-ubuntu-on-your-raspberry-pi#3-wifi-or-ethernet

Errors were encountered while processing: linux-image-3.13.0-128-generic

Problem

You are trying to install/remove a package but you always get an error message about linux message as above:

Solution

Try the following:

Docker – Debian – Kernel panick – Automatic restart

Problem

You have a remote server (Debian) running some Docker containers and you want to make sure that they all restart in the event of a kernel panick.

solution

  • Add an automatic restart after a kernel panick by running:

  • Emulate a kernel panick by running the following (SysRq more info here :

  • Check that the containers have restarted again with docker ps (NOTE: the containers should have been enabled to autorestart)

failed to execute ‘/lib/udev/socket:@/org/freedesktop/hal/udev_event’ ‘socket:@/org/freedesktop/hal/udev_event’

Problem

Looking at your /var/log/syslog you see entries every few seconds like the following:

Solution

Seems that hal is not used in newer Ubuntu versions, so you can remove it:

Taken from the answer here

Find out how your Linux system was booted (with what command)

If you would like to know how your linux system was booted type the following to give you the information that you need: