Rachel Cole

Rachel Cole

1582259379

How To Install R on Ubuntu 18.04

Introduction

R is an open-source programming language that specializes in statistical computing and graphics. Supported by the R Foundation for Statistical Computing, it is widely used for developing statistical software and performing data analysis. An increasingly popular and extensible language with an active community, R offers many user-generated packages for specific areas of study, which makes it applicable to many fields.

In this tutorial, we will install R and show how to add packages from the official Comprehensive R Archive Network (CRAN).

Prerequisites

To follow along with this tutorial, you will need an Ubuntu 18.04 server with:

  • at least 1GB of RAM
  • a non-root user with sudo privileges

Step 1 — Installing R

Because R is a fast-moving project, the latest stable version isn’t always available from Ubuntu’s repositories, so we’ll start by adding the external repository maintained by CRAN.

Note: CRAN maintains the repositories within their network, but not all external repositories are reliable. Be sure to install only from trusted sources.

Let’s first add the relevant GPG key.

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys E298A3A825C0D65DFD57CBB651716619E084DAB9

When we run the command, we’ll receive the following output:

OutputExecuting: /tmp/apt-key-gpghome.4BZzh1TALq/gpg.1.sh --keyserver keyserver.ubuntu.com --recv-keys E298A3A825C0D65DFD57CBB651716619E084DAB9
gpg: key 51716619E084DAB9: public key "Michael Rutter <marutter@gmail.com>" imported
gpg: Total number processed: 1
gpg:               imported: 1

Once we have the trusted key, we can add the repository. Note that if you’re not using 18.04, you can find the relevant repository from the R Project Ubuntu list, named for each release.

sudo add-apt-repository 'deb https://cloud.r-project.org/bin/linux/ubuntu bionic-cran35/'

Among the output that displays, you should identify lines similar to the following:

Output...
Get:5 https://cloud.r-project.org/bin/linux/ubuntu bionic-cran35/ InRelease [3609 B]                 
...                    
Get:6 https://cloud.r-project.org/bin/linux/ubuntu bionic-cran35/ Packages [21.0 kB]
...

Now, we’ll need to run update after this in order to include package manifests from the new repository.

sudo apt update

Among the output should be a line similar to the following:

Output...
Hit:2 https://cloud.r-project.org/bin/linux/ubuntu bionic-cran35/ InRelease
...

If the line above appears in the output from the update command, we’ve successfully added the repository. We can be sure we won’t accidentally install an older version.

At this point, we’re ready to install R with the following command.

sudo apt install r-base

If prompted to confirm installation, press y to continue.

As of the time of writing, the latest stable version of R from CRAN is 3.5.1, which is displayed when you start R.

Since we’re planning to install an example package for every user on the system, we’ll start R as root so that the libraries will be available to all users automatically. Alternatively, if you run the R command without sudo, a personal library can be set up for your user.

sudo -i R

Output
R version 3.5.1 (2018-07-02) -- "Feather Spray"
Copyright (C) 2018 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)
...
Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

>

This confirms that we’ve successfully installed R and entered its interactive shell.

Step 2 — Installing R Packages from CRAN

Part of R’s strength is its available abundance of add-on packages. For demonstration purposes, we’ll install txtplot, a library that outputs ASCII graphs that include scatterplot, line plot, density plot, acf and bar charts:

install.packages('txtplot')

Note: The following output shows where the package will be installed.

Output...
Installing package into ‘/usr/local/lib/R/site-library’
(as ‘lib’ is unspecified)
. . .

This site-wide path is available because we ran R as root. This is the correct location to make the package available to all users.

When the installation is complete, we can load txtplot:

library('txtplot')

If there are no error messages, the library has successfully loaded. Let’s put it in action now with an example which demonstrates a basic plotting function with axis labels. The example data, supplied by R’s datasets package, contains the speed of cars and the distance required to stop based on data from the 1920s:

txtplot(cars[,1], cars[,2], xlab = 'speed', ylab = 'distance')

Output      +----+-----------+------------+-----------+-----------+--+
  120 +                                                   *    +
      |                                                        |
d 100 +                                                   *    +
i     |                                    *                *  |
s  80 +                          *         *                   +
t     |                                       * *    *    *    |
a  60 +                          *  *      *    *      *       +
n     |                        *         * *  * *              |
c  40 +                *       * *    *  *    * *              +
e     |         *      *  * *  * *  *                          |
   20 +           *    *  * *       *                          +
      |  *      *    *                                         |
    0 +----+-----------+------------+-----------+-----------+--+
           5          10           15          20          25   
                                speed       

If you are interested to learn more about txtplot, use help(txtplot) from within the R interpreter.

Any precompiled package can be installed from CRAN with install.packages(). To learn more about what’s available, you can find a listing of official packages organized by name via the Available CRAN Packages By Name list.

To exit R, you can type q(). Unless you want to save the workspace image, you can press n when prompted.

Conclusion

With R successfully installed on your server, you may be interested in this guide on installing the RStudio Server to bring an IDE to the server-based deployment you just completed. You can also learn how to set up a Shiny server to convert your R code into interactive web pages.

Originally published by By Lisa Tagliaferri at https://www.digitalocean.com

#ubuntu #r #data-science

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How To Install R on Ubuntu 18.04
Chet  Lubowitz

Chet Lubowitz

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How to Install Microsoft Teams on Ubuntu 20.04

Microsoft Teams is a communication platform used for Chat, Calling, Meetings, and Collaboration. Generally, it is used by companies and individuals working on projects. However, Microsoft Teams is available for macOS, Windows, and Linux operating systems available now.

In this tutorial, we will show you how to install Microsoft Teams on Ubuntu 20.04 machine. By default, Microsoft Teams package is not available in the Ubuntu default repository. However we will show you 2 methods to install Teams by downloading the Debian package from their official website, or by adding the Microsoft repository.

Install Microsoft Teams on Ubuntu 20.04

1./ Install Microsoft Teams using Debian installer file

01- First, navigate to teams app downloads page and grab the Debian binary installer. You can simply obtain the URL and pull the binary using wget;

$ VERSION=1.3.00.5153
$ wget https://packages.microsoft.com/repos/ms-teams/pool/main/t/teams/teams_${VERSION}_amd64.deb

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Servo Node

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Install VirtualBox in Ubuntu 21.04/20.04/18.04 › Servo Node

VirtualBox is a widely known and open-source tool offered by Oracle. It’s a cross platform virtualization application that can be installed on any system that allows users to run a number of guest operating systems on single machine over a virtual system.

Means, with the usage of VirtualBox on your system, you can easily install many operating systems and can run them simultaneously which can be helpful to develop, demonstrate, deploy and test applications on a single machine.

How to install VirtualBox On Ubuntu 18.04, 20.04 and 21.04?

Since the virtualization system offered by Oracle is available for cross platforms, even Ubuntu users can install the app and take its benefits. In order to install VirtualBox in Ubuntu variants, there’s a number of approaches that can be helpful.

Installing using default repository

sudo apt install virtualbox

Install using official DEB package

Visit the Virtualbox download page and download DEB package in your machine, and run the following command to install the package using ATP command.

sudo apt install ./virtualbox-6.1_6.1.22-144080_Ubuntu_bionic_amd64.deb

for more approaches and information, Read Here

#install virtual box on ubuntu #install virtual box on ubuntu 18.04 #install virtual box on ubuntu 20.04 #install virtual box on ubuntu21.04

Chet  Lubowitz

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How to Install TeamViewer on Ubuntu 20.04

TeamViewer is a cross-platform, proprietary application that allows a user to remotely connect to a workstation, transfer files, and have online meetings. In this tutorial, we will walk you through how to install TeamViewer on Ubuntu 20.04 Desktop through the command line.

Prerequisites

Before continuing with this tutorial, make sure you are logged in as a user with sudo privileges.

Installing TeamViewer on Ubuntu

01- To install TeamViewer, first, download the TeamViewer .deb package. So, open the Terminal and run the following wget command.

$ wget https://download.teamviewer.com/download/linux/teamviewer_amd64.deb

02- Once you have downloaded the TeamViewer‘s Debian package, execute the following command to install Teamviewer:

$ sudo apt install ./teamviewer_amd64.deb

The system will prompt you with a [Y/n] option. Type ‘Y‘ and hit the enter key in order for to continue the installation.

03- Once the installation is done, you can launch TeamViewer either by typing the command teamviewer in your terminal or by clicking on the TeamViewer icon (Activities -> TeamViewer).

04- A pop-up License Agreement will be displayed. To proceed, click on the Accept License Agreement button.

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How to Install PgAdmin 4 on Ubuntu 20.04

pgAdmin is the leading graphical Open Source management, development and administration tool for PostgreSQL. pgAdmin4 is a rewrite of the popular pgAdmin3 management tool for the PostgreSQL database.

In this tutorial, we are going to show you how to install pgAdmin4 in Server Mode as a web application using apache2 and Wsgi module on Ubuntu 20.04 LTS.

#databases #linux #ubuntu #install pgadmin4 #install pgadmin4 ubuntu #install pgadmin4 ubuntu 20 #pgadmin4 #ubuntu pgadmin4 #ubuntu pgadmin4 install

Brain  Crist

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How to Install Android Studio on Ubuntu 20.04

1./ Install Android Studio Using APT

Method 1./ Install Android Studio Using APT

1- We need to add official repository to the sources list. Therefore, type the below command to add the Android Studio repository:

$ sudo add-apt-repository ppa:maarten-fonville/android-studio

02- Now let’s install Android studio and all the software dependencies as below.

$ sudo apt update
$ sudo apt install android-studio

Method 2./ Install Android Studio Using snap

We can install using the snap tool. So, use the below command to install Android Studio:

$ sudo snap install android-studio --classic

2./ Starting Android Studio

01- You can start Android Studio either by typing the command android-studio in your terminal or by clicking on the Android Studio icon (Activities -> Android Studio).

How to Install Android Studio on Ubuntu 20.04

02- When you start Android Studio for the first time, a window like the following will appear asking you to import Android Studio settings from a previous installation. However, if you have a previous installation of Android Studio, simply browse to the configuration folder. If not, go with the default option which is Do not import settings.

How to Install Android Studio on Ubuntu 20.04

03- Click on the Next button, and you will be presented with a window to choose your type of setup you want for Android Studio. So, let’s choose Standard which will install the most common settings and options as below.

How to Install Android Studio on Ubuntu 20.04

04- Click Next and you’ll be taken to the following window to choose your UI theme:

How to Install Android Studio on Ubuntu 20.04

05- You’ll be taken to a window to verify your chosen settings. Simply click on Next. Finally, wait for the Wizard to download and install the required dependencies before you can start your first Android project

How to Install Android Studio on Ubuntu 20.04

#linux #ubuntu #install android studio #install android studio ubuntu #install sdk ubuntu #sdk #sdk install android studio #ubuntu install android studio