Installing Ruby on Rails on CentOS and Ubuntu

Ruby on Rails Is a free and open source web application framework that makes building web applications easier and faster. There are hundreds of thousands of popular applications, such as campBasecamp, GitHub, Shopify, Airbnb, Twitch, SoundCloud, Hulu, Zendesk, Square, Highrise, many of which are built using Ruby on Rails. This tutorial shows how to install Ruby on Rails on CentOS 7 and Ubuntu 18.04 LTS server. Also, the installation instructions below should work on other DEB and RPM based distributions.

Install Ruby on Rails

Precondition

Update and upgrade your Ubuntu system using the following commands:

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

On CentOS, execute the following:

$ sudo yum update

Next install RUhVIron Manager (soon RVM). This is a command line tool used to easily install, manage and operate multiple Ruby environments.

You need to download and add the RVM public key. For that, install curl First the package.

For CentOS:

$ sudo yum install curl

For Ubuntu:

$ sudo apt-get install curl

Next, run the following commands one at a time to download and add the RVM public key:

$ curl -#LO https://rvm.io/mpapis.asc
$ gpg --import mpapis.asc

Download the RVM installer script using the following command:

$ curl -sSL https://get.rvm.io | bash -s stable

Sample output:

Downloading https://github.com/rvm/rvm/archive/1.29.3.tar.gz
Downloading https://github.com/rvm/rvm/releases/download/1.29.3/1.29.3.tar.gz.asc
gpg: Signature made Monday 11 September 2017 02:29:21 AM IST
gpg: using RSA key E206C29FBF04FF17
gpg: Good signature from "Michal Papis (RVM signing) <[email protected]>" [unknown]
gpg: aka "Michal Papis <[email protected]>" [unknown]
gpg: aka "[jpeg image of size 5015]" [unknown]
gpg: WARNING: This key is not certified with a trusted signature!
gpg: There is no indication that the signature belongs to the owner.
Primary key fingerprint: 409B 6B17 96C2 7546 2A17 0311 3804 BB82 D39D C0E3
 Subkey fingerprint: 62C9 E5F4 DA30 0D94 AC36 166B E206 C29F BF04 FF17
GPG verified '/home/sk/.rvm/archives/rvm-1.29.3.tgz'

Installing RVM to /home/sk/.rvm/
 Adding rvm PATH line to /home/sk/.profile /home/sk/.mkshrc /home/sk/.bashrc /home/sk/.zshrc.
 Adding rvm loading line to /home/sk/.profile /home/sk/.bash_profile /home/sk/.zlogin.
Installation of RVM in /home/sk/.rvm/ is almost complete:

* To start using RVM you need to run `source /home/sk/.rvm/scripts/rvm`
 in all your open shell windows, in rare cases you need to reopen all shell windows.

As you noticed in the output above, there is the following line “To start using RVM, you need to run` source / home / sk / .rvm / scripts / rvm`. “:

Therefore, execute the command to set the RVM environment path.

$ source ~/.rvm/scripts/rvm

This line may be different for RPM based systems. Check the output and execute the command accordingly. On CentOS 7 OS, To start using RVM, you need to run “source /etc/profile.d/rvm.sh”.

So I ran the following command:

$ source /etc/profile.d/rvm.sh

After adding the RVM path, run the following command to install the RVM dependencies:

$ rvm requirements

Sample output:

Checking requirements for ubuntu.
Installing requirements for ubuntu.
Updating system ..
.
Installing required packages: g++, gcc, make, libc6-dev, libreadline6-dev, zlib1g-dev, libssl-dev, libyaml-dev, libsqlite3-dev, sqlite3, autoconf, libgmp-dev, libgdbm-dev, libncurses5-dev, automake, libtool, bison, pkg-config, libffi-dev...............................
Requirements installation successful.

Completed Ruby on Rails prerequisites.

Go ahead and install Ruby and Rails.

Install Ruby

Now, use the command to find the available Ruby version:

$ rvm list known

Sample output:

# MRI Rubies
[ruby-]1.8.6[-p420]
[ruby-]1.8.7[-head] # security released on head
[ruby-]1.9.1[-p431]
[ruby-]1.9.2[-p330]
[ruby-]1.9.3[-p551]
[ruby-]2.0.0[-p648]
[ruby-]2.1[.10]
[ruby-]2.2[.7]
[ruby-]2.3[.4]
[ruby-]2.4[.1]
ruby-head

# for forks use: rvm install ruby-head- --url https://github.com/github/ruby.git --branch 2.2

# JRuby
jruby-1.6[.8]
jruby-1.7[.27]
jruby[-9.1.13.0]
jruby-head

# Rubinius
rbx-1[.4.3]
rbx-2.3[.0]
rbx-2.4[.1]
rbx-2[.5.8]
rbx-3[.84]
rbx-head

# Opal
opal

# Minimalistic ruby implementation - ISO 30170:2012
mruby-1.0.0
mruby-1.1.0
mruby-1.2.0
mruby-1[.3.0]
mruby[-head]

# Ruby Enterprise Edition
ree-1.8.6
ree[-1.8.7][-2012.02]

# Topaz
topaz

# MagLev
maglev[-head]
maglev-1.0.0

# Mac OS X Snow Leopard Or Newer
macruby-0.10
macruby-0.11
macruby[-0.12]
macruby-nightly
macruby-head

# IronRuby
ironruby[-1.1.3]
ironruby-head

To install a Ruby version such as 2.4.1, run the following command from a terminal:

$ rvm install 2.4.1

Sample output:

Searching for binary rubies, this might take some time.
No binary rubies available for: ubuntu/18.04/x86_64/ruby-2.4.1.
Continuing with compilation. Please read 'rvm help mount' to get more information on binary rubies.
Checking requirements for ubuntu.
Installing requirements for ubuntu.
Updating system...
Installing required packages: libreadline6-dev...
Requirements installation successful.
Installing Ruby from source to: /home/sk/.rvm/rubies/ruby-2.4.1, this may take a while depending on your cpu(s)...
ruby-2.4.1 - #downloading ruby-2.4.1, this may take a while depending on your connection...
 % Total % Received % Xferd Average Speed Time Time Time Current
 Dload Upload Total Spent Left Speed
100 11.9M 100 11.9M 0 0 74477 0 0:02:48 0:02:48 --:--:-- 88459
ruby-2.4.1 - #extracting ruby-2.4.1 to /home/sk/.rvm/src/ruby-2.4.1....
ruby-2.4.1 - #applying patch /home/sk/.rvm/patches/ruby/2.4.1/random_c_using_NR_prefix.patch.
ruby-2.4.1 - #configuring..................................................................
ruby-2.4.1 - #post-configuration..
ruby-2.4.1 - #compiling.......................................................................-
ruby-2.4.1 - #installing...........
ruby-2.4.1 - #making binaries executable..
ruby-2.4.1 - #downloading rubygems-2.6.14
 % Total % Received % Xferd Average Speed Time Time Time Current
 Dload Upload Total Spent Left Speed
100 751k 100 751k 0 0 46591 0 0:00:16 0:00:16 --:--:-- 44278
No checksum for downloaded archive, recording checksum in user configuration.
ruby-2.4.1 - #extracting rubygems-2.6.14....
ruby-2.4.1 - #removing old rubygems.........
ruby-2.4.1 - #installing rubygems-2.6.14...........................
ruby-2.4.1 - #gemset created /home/sk/.rvm/gems/[email protected]
ruby-2.4.1 - #importing gemset /home/sk/.rvm/gemsets/global.gems..............................|
ruby-2.4.1 - #generating global wrappers........
ruby-2.4.1 - #gemset created /home/sk/.rvm/gems/ruby-2.4.1
ruby-2.4.1 - #importing gemsetfile /home/sk/.rvm/gemsets/default.gems evaluated to empty gem list
ruby-2.4.1 - #generating default wrappers........
ruby-2.4.1 - #adjusting #shebangs for (gem irb erb ri rdoc testrb rake).
Install of ruby-2.4.1 - #complete 
Ruby was built without documentation, to build it run: rvm docs generate-ri

Finally, use the command to set the default version of Ruby.

$ rvm use 2.4.1 --default

To check which Ruby version you have installed:

$ ruby -v

Sample output:

ruby 2.4.1p111 (2017-03-22 revision 58053) [x86_64-linux]

that’s it. Next, you need to install Rails.

Install Rails

Rails can be installed using the following command:

$ gem install rails

The above command will install the latest Rails version. You can also install a specific version, such as 4.2.6, as follows:

$ gem install rails -v 4.2.6

To view the version of Rails installed, run:

$ rails -v

Sample output:

Rails 5.2.0

that’s it. Ruby on Rails is installed on CentOS 7 and Ubuntu 18.04 LTS Server Edition. For more information on setting up a Ruby and Rails development environment, follow the link at the end of this tutorial.

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Things better for the future. stay tuned!

cheers!

Reference link:

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