Installing Multiple Versions of Node.js on Ubuntu Using NVM
Let's look at the nvm tool for ubuntu and its basic commands for switching between node versions.
More detailed information on all OS on the official .
1. Installation will require the presence of the following libraries :
apt-transport-https-ca-certificates curl software-properties-common
sudo apt-get install apt-transport-https ca-certificates curl software-properties-common
2. Add the GPG key :
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
In response, you should receive " OK "
3. Key verification :
We make sure that everything went well and look for the last 8 digits of the key of the official docker key.
sudo apt-key fingerprint 0EBFCD88
in my case found in /etc/apt/trusted.gpg
pub 4096R/0EBFCD88 2017-02-22
Отпечаток ключа = 9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88
uid Docker Release (CE deb) <docker@docker.com>
sub 4096R/F273FCD8 2017-02-22
4. Add docker repository :
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
sudo apt-get update
This repository is for ubuntu 14.04 on x86_64 / amd64 architecture. For the rest, you can look at the offsite above.
5. Direct installation itself :
sudo apt-get install docker-ce
6. Check docker performance :
sudo docker run hello-world
In the end it will look like this

7. Adding a user :
If you need to add the user under which you are now, so as not to enter sudo every time, you should run the command:
sudo usermod -aG docker your username
Be sure to log in again for the changes to take effect.
Received version :

Let's look at the nvm tool for ubuntu and its basic commands for switching between node versions.
Consider setting up swap if there is enough RAM available. The effect of the swappiness parameter on the aggressiveness of swap file usage.
Let's consider the possibility of changing the parameters of the configuration file (php.ini) on a hosting that does not have the ability to configure the Cron scheduler (cli) from the panel.
Configuring Apache for high volume Cookies. Let's analyze the error "Bad Request. Your browser sent a request that this server could not understand. Size of a request header field exceeds server limit." and options to configure the server.
Let's try to cure the black screen when booting Ubuntu after installing proprietary nvidia-340 driver on Nvidia 630M laptop.