Installing node & npm : Ubuntu 18.04 LTS

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

## Installing the NodeSource Node.js 10.x repo...


## Populating apt-get cache...

+ apt-get update
Hit:1 http://ph.archive.ubuntu.com/ubuntu bionic InRelease
Hit:2 http://packages.microsoft.com/repos/vscode stable InRelease              
Get:3 http://ph.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]  
Get:4 http://ph.archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
Get:5 http://ph.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages [887 kB]
Hit:6 http://ppa.launchpad.net/inkscape.dev/stable/ubuntu bionic InRelease    
Hit:7 http://security.ubuntu.com/ubuntu bionic-security InRelease              
Fetched 1,051 kB in 2s (443 kB/s)                          
Reading package lists... Done

## Confirming "bionic" is supported...

+ curl -sLf -o /dev/null 'https://deb.nodesource.com/node_10.x/dists/bionic/Release'

## Adding the NodeSource signing key to your keyring...

+ curl -s https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -
OK

## Creating apt sources list file for the NodeSource Node.js 10.x repo...

+ echo 'deb https://deb.nodesource.com/node_10.x bionic main' > /etc/apt/sources.list.d/nodesource.list
+ echo 'deb-src https://deb.nodesource.com/node_10.x bionic main' >> /etc/apt/sources.list.d/nodesource.list

## Running `apt-get update` for you...

+ apt-get update
Hit:1 http://ph.archive.ubuntu.com/ubuntu bionic InRelease
Hit:2 http://packages.microsoft.com/repos/vscode stable InRelease              
Hit:3 http://ph.archive.ubuntu.com/ubuntu bionic-updates InRelease            
Get:4 http://ph.archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
Hit:5 http://security.ubuntu.com/ubuntu bionic-security InRelease              
Get:6 https://deb.nodesource.com/node_10.x bionic InRelease [4,584 B]          
Hit:7 http://ppa.launchpad.net/inkscape.dev/stable/ubuntu bionic InRelease    
Get:8 https://deb.nodesource.com/node_10.x bionic/main amd64 Packages [765 B]  
Fetched 79.9 kB in 1s (54.2 kB/s)
Reading package lists... Done

## Run `sudo apt-get install -y nodejs` to install Node.js 10.x and npm
## You may also need development tools to build native addons:
     sudo apt-get install gcc g++ make
## To install the Yarn package manager, run:
     curl -sL https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
     echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
     sudo apt-get update && sudo apt-get install yarn


$ sudo apt install nodejs
Reading package lists... Done
Building dependency tree      
Reading state information... Done
The following NEW packages will be installed:
  nodejs
0 upgraded, 1 newly installed, 0 to remove and 19 not upgraded.
Need to get 16.2 MB of archives.
After this operation, 81.1 MB of additional disk space will be used.
Get:1 https://deb.nodesource.com/node_10.x bionic/main amd64 nodejs amd64 10.19.0-1nodesource1 [16.2 MB]
Fetched 16.2 MB in 21s (787 kB/s)                                              
Selecting previously unselected package nodejs.
(Reading database ... 170910 files and directories currently installed.)
Preparing to unpack .../nodejs_10.19.0-1nodesource1_amd64.deb ...
Unpacking nodejs (10.19.0-1nodesource1) ...
Setting up nodejs (10.19.0-1nodesource1) ...
Processing triggers for man-db (2.8.3-2ubuntu0.1) ...
bboycan@bboy-Latitude-E7450:~$ node -v
v10.19.0
$ npm -v
6.13.4