This is a brief illustration with regards to the automatic installation of the sofware packages such as NVM, Node, Docker, Docker Compose, Openssl and Git using scripting.

The files for the automation is written in 'Shell Scripting' language. These are installed in Ubuntu Server 16.04 LTS. Parent script is the master.sh script which internally invokes the other child scripts over ssh onto defined hostnames in order to execute the respective installations.

After launching two servers in ubuntu, we have to establish a connection between these servers. Such that if we run a script in one server it will automatically get installed in another one.

Below are the set of commands for generating the rsa keys of server:

ssh-keygen -t rsa
cd .ssh
cat id_rsa.pub

copy the content of id_rsa.pub in server 2 run the below commands

cd .ssh
vi authorized_keys

paste the copied content in the above

By doing this we can successfully establish the passwordless ssh connection between two servers test it by executing : ssh username@hostname

we have to give the initials for the installation used in yhe script such as

red="$(tput setaf 1)"

green="$(tput setaf 2)"

blue="$(tput setaf 4)"

reset="$(tput sgr0)"

bold="$(tput bold)"

->Old Version

to uninstall old if it is present then run this command

sudo apt-get remove docker docker-engine docker.io

->Update

to update ubuntu after removing the older version (if present)

sudo apt-get update

sudo apt-get libcurl4

->Installing

To install a package we have to allow apt to use a repository over HTTPS

sudo apt-get install apt-transport-https ca-certificates curl software-properties-common

we have to add docker offical GPG key from the offical docker url for ubuntu

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

to verify if the downloaded key is present or not

sudo apt-key fingerprint 0EBFCD88

we have to add a repository by using this key for the furthur process

sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

Now again update the ubuntu

sudo apt-get update

After completion of this finally run the installation command

sudo apt-get install docker-ce

apt-cache madison docker-ce

To define the version of Docker, which has to be installed in ubuntu

sudo apt-get install docker-ce=18.06.0~ce~3-0~ubuntu .

Finally check if the Docker is successfully installed or not

docker --version

Initially write "version='1.18.0'" to dowload a particular version package

-> Installing Docker Compose

Install the package using the below link

sudo curl -L https://github.com/docker/compose/releases/download/$version/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose > ~/autom/dockercompose.log

After installing set the permissions

sudo chmod +x /usr/local/bin/docker-compose

to check wether it is installed or not

docker-compose --version

-> To install git for ubuntu

By running a single command you can able to install git package

apt-get install git-core

-> Check version

verify wether it is installrd or not

git --version

To download particular version, initially write 'version="1.1.1"'

-> Install Open SSL

to extract run the following command

wget https://www.openssl.org/source/openssl-$version.tar.gz

to tar and zip run

tar xvf openssl-$version.tar.gz

to open the file run

cd openssl-$version

to explore the file

sudo ./config -Wl,--enable-new-dtags,-rpath,'$(LIBRPATH)'

to execute

sudo make

sudo make install

To verify wether it is installed or not

openssl --version

Initially give node & nvm versions to download of a particular version

write 'version=8.12.0"

nvm_version="v0.33.2"

-> Install nvm in a directory

wget https://raw.githubusercontent.com/creationix/nvm/$nvm_version/install.sh

run the script

bash install.sh

Export the command from nvm.log which loads the nvm

----> Node.JS

Node.js version comes default with the NVM package

we have to find the version first locally,if find run locally otherwise run remotely

nvm ls | grep  "$version"

write 'for loop' condition for above code

Find the version remotely

nvm ls-remote | grep  "$version"

write 'for loop' condition for above code

If found install Node.JS for $version

nvm install $version

Finally use the Node.JS

nvm use $version