Monthly Archives: September 2018

32. DevOps: Ubuntu 18.04: Installing git and usage of CodeCommit with a code migration POC

From this blog, you will learn the following:

  1. How to Install git into Ubuntu 18.04  VM ?
  2. How to practice the git commands through the past blog ?
  3. What is VCS and Git, the differences ?
  4. What is AWS CodeCommit ?
  5. How a POC can be done for a code migration into AWS CodeCommit from GitHUb ? [From series of videos/past sessions].

This video demonstrates the installation of Git on Ubuntu 18.04 LTS Bionic Beaver.

To work with Git basic commands, I wrote the below blog, you can use for your practice.

The following are the sessions for VCS/GITHUB and CodeCommit:

If you are keen practicing Mock interviews for a Job Description, Please read the below blog to contact:

19. DevOps:How to upload your docker image to your dockerhub account ?


How to upload your docker image to your dockerhub account from Ubuntu  ?

In my previous session, we have created the MySQL docker image.

Now let us assume, we need to move into a private registry of dockerhub to save it.

In this exercise we will see:
1. How to use dockerid and tag the image ?
2. How to list the images with dockerid ?
3. How to login to dockerhub with your id ?
4. How to upload your docker image to your docker account and registry ?

Pre-requisites: You need to have your dockerid from

======>Current mysql images====>
vskumar@ubuntu:~$ sudo docker image ls mysql*
[sudo] password for vskumar:
mysql latest 5d4d51c57ea8 5 weeks ago 374MB

1. How to use dockerid and tag the image ?

My docker id is: vskumardocker
== Using docker id into local variable====>
vskumar@ubuntu:~$ export DOCKERID=vskumardocker
vskumar@ubuntu:~$ echo $DOCKERID

= Tagging with dockerid ====>
vskumar@ubuntu:~$ sudo docker image build –tag $DOCKERID/mysql .
ERRO[0301] Can’t add file /home/vskumar/.gnupg/S.gpg-agent to tar: archive/tar: sockets not supported
ERRO[0324] Can’t add file /home/vskumar/.local/share/ubuntu-amazon-default/ubuntu-amazon-default/SingletonSocket to tar: archive/tar: sockets not supported
Sending build context to Docker daemon 808MB
Step 1/2 : FROM mysql
—> 5d4d51c57ea8
Step 2/2 : CMD [“echo”, “This is Mysql done by vskumar for a lab practice of dockerfile”]
—> Using cache
—> 659477c48f0a
Successfully built 659477c48f0a
Successfully tagged vskumardocker/mysql:latest
== Tagged mysql image =======>

=== Let us check it ===>
vskumar@ubuntu:~$ sudo docker image ls |more
vskumardocker/mysql latest 659477c48f0a 4 weeks ago 374MB
mysql latest 5d4d51c57ea8 5 weeks ago 374MB
== Newly tagged image is there ====>

2. How to list the images with dockerid ?

You can also list the images with dockerid assigned as below:

= How to list the images with dockerid? ====>
vskumar@ubuntu:~$ sudo docker image ls -f reference=”$DOCKERID/*”
vskumardocker/mysql latest 659477c48f0a 4 weeks ago 374MB

3. How to login to dockerhub with your id ?

=== Login to dockerhub====>
vskumar@ubuntu:~$ sudo docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don’t have a Docker ID, head over to to create one.
Username: vskumardocker
Login Succeeded

4. How to upload your docker image to your docker account and registry ?

Now, let us use docker push command to push the image to dockerhub:

=== Pushing the image to dockerhub account registry ===>
vskumar@ubuntu:~$ sudo docker image push $DOCKERID/mysql:latest
The push refers to repository []
12ea28f10d69: Mounted from library/mysql
400836ab4664: Mounted from library/mysql
17d36ba94219: Mounted from library/mysql
d7758e0ab2b0: Mounted from library/mysql
921bf5c178ac: Mounted from library/mysql
3cf1630a511d: Mounted from library/mysql
b80c494a1fdc: Mounted from library/mysql
7b2001677ac9: Mounted from library/mysql
8b452d78b126: Mounted from library/mysql
292c1ee413d0: Mounted from library/mysql
014cf8bfcb2d: Mounted from library/mysql
latest: digest: sha256:09ebaab0035b1955a83646ea41f43a2cd870c934a2255da090918ff7ad37dd0f size: 2621
==Note, repository name, TAG should be there correctly ===>

Now, we can see this image on the web page of the docker account:
===== pushed Image onto dockerhub web page ====>
I found the image on the web page with the below name:




20. DevOps:How to Install docker for Windows 10 and use for containers creation ?

How to Install docker for Windows 10 and use for containers creation ?:


 In this blog,  I have shown the steps for  docker installation on Windows10 OS.

To install the docker for windows 10 OS, you need to download the docker-install.exe from the below url:

 I have copied all the screens below, while doing my installation.  

You can follow the same.


Check on your desktop for boot2docker icon.

You can also install docker toolbox as below:


Now, go to your Boot2Dcoker icon on your desktop.

Double Click on it.

In the following screens you can see with its start process.


You can use the below blogs for containers creation.

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Look into this video also:
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Visit some more videos:

How to change your linux virtual  machines hostname and connect with ssh?

How to change your linux virtual  machines hostname and connect with ssh?

In this blog/video, I would like to demonstrate
the following by connecting hostnames with ssh:

Sometimes, we need to have hostnames differently.
When you use deployments using Ansible, etc. SCM tools
we can connect to the hostnames directly.
Now let us analyze and use the exercise as below:

By default we can find the hostname with;
$ ls -l /proc/sys/kernel/hostname
$ cat /proc/sys/kernel/hostname

We can also look into the details by using;

To change the new name use;
$hostnamectl set-hostname ‘ans-dbserver’
Step1: Checking the current  hostname.

Step2: Checking the host details in hostnamectl.

Step3: Changing the hostname.

Step4: Looking for new host details.

Step5: Reboot the machine and check its
connection with new hostname.

Step6: Now, let us try to connect to other machines
with ssh connectivity.

Step7: Making sure the renamed machine host is
being accessed by other machines also through ping.

Step8: Install openssh-server to connect through ssh in the newly named machine.

Step9: Connect through ssh from master machine to current hosts.

The attached video has the demonstration for all the above steps on Linux Virtual machines. Proved with a connectivity through ssh.

For SSH configuration please visit my blog, it has the demonstrated video also:





1. AWS:How to create and activate a new account in AWS ?

AWS Account-creation scrn

How to create and activate a new account in AWS ?:

In this blog, you will see the required steps for creating and activating your new AWS account. Once have the activated account, you can start your other lab practices as I discuss in the class timely.

The following are the main 4 steps process we need to follow:

STEP1: Creating your account. It consists of 2 steps: a) Providing a valid e-mail address and choosing a password. b) Providing your contact information and setting your preferences.

STEP2: Add a payment method Please note; you need to have a valid CC to give its details. Amazon verifies its transaction also with a tiny charge and with a credit back. If by mistaken given wrong data please note; your account registration process will not be activated. You will be intimated by mail. This way Amazon is authenticating/authorizing us for AWS usage.

STEP3: Verify your phone number. You need to Provide a phone number where you can be reached in next few minutes, while creating your account.

STEP4: Choose the AWS Support plans. Time to time the AWS plans will be published. You need to choose the plan from the currently available plans for your needs. The relevant URL is given in the detailed steps section in this blog.

As a consolidated process, we can understand from the below flow chart. Which is from the collection of AWS process charts.

AWS Account-creation flowchart


I am not copying the screens due to privacy.

Detailed steps

STEP1: Detailed steps for Creating your account.

a). You need to go to Amazon Web Services home page URL:

b). Now, Choose Sign Up. Click on Create an AWS account. You can see new page with Create an AWS account. You need to enter the required details. E-mail id, Pwd, AWS Account name [you can give any name for this]. And choose continue to go to next page. Please note; The above steps are valid for the new users of AWS. If you enter your email address entered incorrectly, you might not be able to access your account or change your password in the future. So you need to be careful on your data entry part. Let us assume; if you’ve signed in to AWS recently, it might say Sign In to the Console. So you need to login into your existing Account.

c). Now in the current page, choose Professional or personal. These two areas will give equal services. Depends on your need You can choose one of the options.

d). From the above options choosed, type the requested company or personal information entries. Note; At this point, You need to go through the AWS Customer Agreement to know their policies and procedures to follow while operating.

e). Finally, you choose Create Account and Continue options in the bottom.

f). Please note; at this point you will receive an e-mail to confirm that your account is created. Now, you can sign in to your new account using the valid email address and valid password you have supplied earlier.

Please note; we have done the Step1 only, the activation process is not yet completed to use the AWS services. Still we need to follow 3 more steps.

STEP2: Add a payment method- Detailed steps:

At this point; On the Payment Information page,

a) Choose the payment method as per the payment gateway standards which is displayed.

b) Type the requested information associated with your payment method. Please make sure the address for your payment method is the same as the address you provided for your account. Note; If your billing address is different; then choose Use a new address, type the billing address for your payment method.

c) Now, choose Secure Submit.

STEP3: Verify your phone number.

Please keep a valid and handy phone number at this point.

a) On this Phone Verification page, type a phone number where can use to accept incoming phone calls.

b) Enter the code displayed in the captcha. When you’re ready to receive a call, choose Call me now option.

c) In a few moments, an automated system will call you to your given phone number. Even it might have SMS feature also, if you are outside North America region.

d) Type the provided PIN on your phone’s keypad of the AWS screen. e) After the process is complete, choose Continue.

STEP4: Choose the AWS Support plans.

a) At this point please visit the below URL:

You can select the AWS support plans from the given list.

b) After your selection of a Support plan, a confirmation page denotes that your account is being activated.

c) Please note; Accounts are usually activated within a few minutes, but the process might take up to 24 hours. This process includes the validation of Bank/CC account given there.

d) Hence keep looking for a mail on this subject from Amazon to start your AWS services usage.

Assuming everything went well, and your AWS account is activated now.  Congratulations!

We can look into next lab with reference to the class session.

2. AWS: WordPress[WP] infrastructure creation using a free tier account


If you are interested to learn Virtualization with Vagrant visit:

1. Vagrant/Virtual Box:How to create Virtual Machine[VM] on Windows 10?:



If you are not a student of my class, and looking for it please contact me by mail with your LinkedIn identity. And send a connection request with a message on your need. You can use the below contacts. Please note; I teach globally.


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