Upgrading node and yarn

Posted on 11 March 2021 by kosmas

Problem

You are getting the following error when trying to use yarn:

$ yarn
yarn install v1.21.1
[1/5] Validating package.json...
error xxxxx@: The engine "node" is incompatible with this module. Expected version "^10.0.0". Got "8.10.0"
error Found incompatible module.
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.

SHELL
​x
 
$ yarnyarn install v1.21.1[1/5] Validating package.json...error xxxxx@: The engine "node" is incompatible with this module. Expected version "^10.0.0". Got "8.10.0"error Found incompatible module.info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.

Solution

Upgrade yarn

$ curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
[sudo] password for username: 
OK

$ echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
deb https://dl.yarnpkg.com/debian/ stable main

$ sudo apt-get update
$ sudo apt-get upgrade

SHELL
 
$ curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -[sudo] password for username: OK​$ echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.listdeb https://dl.yarnpkg.com/debian/ stable main​$ sudo apt-get update$ sudo apt-get upgrade​

Which should give the updated yarn version:

$ yarn
yarn install v1.22.5
[1/5] Validating package.json...
error xxxxx@: The engine "node" is incompatible with this module. Expected version "^10.0.0". Got "8.10.0"
error Found incompatible module.
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.

SHELL
 
$ yarnyarn install v1.22.5[1/5] Validating package.json...error xxxxx@: The engine "node" is incompatible with this module. Expected version "^10.0.0". Got "8.10.0"error Found incompatible module.info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.​

Upgrade node version with the correct version from above (ie 10.0.0)

$ curl -fsSL https://deb.nodesource.com/setup_10.x | sudo -E bash -

$ sudo apt-get install -y nodejs
....
The following packages will be upgraded:
  nodejs
...

HTML
 
$ curl -fsSL https://deb.nodesource.com/setup_10.x | sudo -E bash -​$ sudo apt-get install -y nodejs....The following packages will be upgraded:  nodejs...

And then the needed versions would have been installed:

$ yarn
yarn install v1.22.5
[1/5] Validating package.json...
[2/5] Resolving packages...
success Already up-to-date.
Done in 0.90s.

SHELL
 
$ yarnyarn install v1.22.5[1/5] Validating package.json...[2/5] Resolving packages...success Already up-to-date.Done in 0.90s.

Linux disabling a service on bootup

Posted on 12 February 2021 by kosmas

0 Comments

To stop having a service automatically start after bootup in a Linux system with systemctl use the following to stop and then disable the service:

sudo systemctl stop service_name
sudo systemctl disable service_name

SHEL
 
sudo systemctl stop service_namesudo systemctl disable service_name

Raspberry, Ubuntu and Megatools

Posted on 17 June 2020 by kosmas

0 Comments

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

sudo apt-get -y install build-essential libglib2.0-dev libssl-dev libcurl4-openssl-dev libgirepository1.0-dev

SHELL<br>
 
sudo apt-get -y install build-essential libglib2.0-dev libssl-dev libcurl4-openssl-dev libgirepository1.0-dev 

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

wget https://megatools.megous.com/builds/megatools-1.10.3.tar.gz

SHELL
 
wget https://megatools.megous.com/builds/megatools-1.10.3.tar.gz

Compile and install them

tar xvfz megatools-1.10.3.tar.gz
cd megatools-1.10.3
./configure
make
sudo make install
sudo ldconfig

SHELL<br>
 
tar xvfz megatools-1.10.3.tar.gzcd megatools-1.10.3./configuremakesudo make installsudo ldconfig

Add your Mega account credentials in ~/.megarc like:

[Login]
Username = my_mega@email
Password = mypassword

SHELL<br>
 
[Login]Username = my_mega@emailPassword = mypassword

use the mega tools commands (megacopy, megals, megaget etc.

Erlang and Elixir with asdf in Raspberry 4 with Ubuntu 20.04

Posted on 12 June 2020 by kosmas

0 Comments

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):

git clone https://github.com/asdf-vm/asdf.git ~/.asdf --branch v0.7.8

SHELL
 
git clone https://github.com/asdf-vm/asdf.git ~/.asdf --branch v0.7.8

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

# Add asdf version manager 
. $HOME/.asdf/asdf.sh
. $HOME/.asdf/completions/asdf.bash

SHELL
 
# Add asdf version manager . $HOME/.asdf/asdf.sh. $HOME/.asdf/completions/asdf.bash

Reload/Source your bash file with

source ~/.bashrc

SHELL
 
source ~/.bashrc

Install the erlang plugin

asdf plugin add erlang

SHELL
 
asdf plugin add erlang

If you get the following warnings:

...
Extracting source code
Building Erlang/OTP 23.0.2 (asdf_23.0.2), please wait...
WARNING: It appears that a required development package 'libssl-dev' is not installed.
WARNING: It appears that a required development package 'automake' is not installed.
WARNING: It appears that a required development package 'autoconf' is not installed.
WARNING: It appears that a required development package 'libncurses5-dev' is not installed.
Configure failed.
...

SHELL
 
...Extracting source codeBuilding Erlang/OTP 23.0.2 (asdf_23.0.2), please wait...WARNING: It appears that a required development package 'libssl-dev' is not installed.WARNING: It appears that a required development package 'automake' is not installed.WARNING: It appears that a required development package 'autoconf' is not installed.WARNING: It appears that a required development package 'libncurses5-dev' is not installed.Configure failed....

Install the missing packages:

sudo apt install libssl-dev automake autoconf libncurses5-dev

SHELL
 
sudo apt install libssl-dev automake autoconf libncurses5-dev

Install latest erlang version:

asdf install erlang latest
...
Erlang/OTP 23.0.2 (asdf_23.0.2) has been successfully built
...

SHELL
 
asdf install erlang latest...Erlang/OTP 23.0.2 (asdf_23.0.2) has been successfully built...

Set it up globally (if you want):

asdf global erlang 23.0.2

SHELL
 
asdf global erlang 23.0.2

Add elixir plugin:

asdf plugin add elixir

SHELL
 
asdf plugin add elixir

Install latest elixir version (1.10.3):

asdf install elixir latest

SHELL
 
asdf install elixir latest

Set it up globally:

asdf global elixir 1.10.3-otp-23

SHELL
 
asdf global elixir 1.10.3-otp-23

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

mix archive.install hex phx_new 1.5.3

SHELL
 
mix archive.install hex phx_new 1.5.3

WiFi, Raspberry Pi 4 B, Ubuntu 20.04

Posted on 10 June 2020 by kosmas

0 Comments

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

Resetting root password for MySQL (Ubuntu 18.04)

Posted on 17 December 2018 by kosmas

0 Comments

Problem

You want to reset the root password for MySQL in your linux Ubuntu installation.

Solution

Follow the steps described https://linuxconfig.org/how-to-reset-root-mysql-password-on-ubuntu-18-04-bionic-beaver-linux

Reload NGINX configuration

Posted on 23 February 2018 by kosmas

0 Comments

Problem

You have made some changes to the NGINX configuration and you would like to reload them without stopping and starting the server.

Solution

Use the following:

kill -HUP $(cat /var/run/nginx.pid)

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

Posted on 17 August 2017 by kosmas

0 Comments

Problem

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

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

Solution

Try the following:

rm -rf /var/lib/dpkg/info/linux-image-3.13.0-128-generic.*
apt-get purge linux-image-3.13.0-128-generic

Find the release name of your Debian/Ubuntu linux system

Posted on 12 May 2017 by kosmas

0 Comments

Problem

You would like to know the codename (release) name of your Debian/Ubuntu system. Running cat /etc/issue will give you the release version but not the number.

Solution

Run the following command to get your release name:

lsb_release -cs

Docker – Debian – Kernel panick – Automatic restart

Posted on 21 March 2017 by kosmas

0 Comments

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:
```
sysctl kernel.panic=20
```
Emulate a kernel panick by running the following (SysRq more info here :
```
echo c > /proc/sysrq-trigger
```
Check that the containers have restarted again with docker ps (NOTE: the containers should have been enabled to autorestart)

42

Web notebook about thoughts and discoveries in DevOps, SRE, Software Engineering….

Category Archives: Ubuntu/Debian

Upgrading node and yarn

Problem

Solution

Linux disabling a service on bootup

Raspberry, Ubuntu and Megatools

Erlang and Elixir with asdf in Raspberry 4 with Ubuntu 20.04

WiFi, Raspberry Pi 4 B, Ubuntu 20.04

Resetting root password for MySQL (Ubuntu 18.04)

Problem

Solution

Reload NGINX configuration

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

Find the release name of your Debian/Ubuntu linux system

Docker – Debian – Kernel panick – Automatic restart