This presentation about Docker tutorial will help you understand what is Docker, advantages of Docker, how does Docker work, components of Docker, virtual machine vs Docker, advanced concepts in Docker, basic Docker commands along with a demo. A Docker is an OS-level virtualization software that enables developers and IT administrators to create, deploy and run applications in a Docker container with all their dependencies. It is said to be a very light-weight software container and containerization platform. Docker engine or Docker is a client-server application that builds and executes using Docker components. Rapid deployment, portability, better efficiency, faster configuration, scalability, security are some of the advantages you get by using Docker. Below topics are explained in this Docker presentation: 1. Virtual machine vs Docker 2. What is Docker? 3. Advantages of Docker 4. How does Docker work? 5. Components of Docker 6. Advanced concepts in Docker 7. Basic Docker commands Why learn DevOps? Simplilearn’s DevOps training course is designed to help you become a DevOps practitioner and apply the latest in DevOps methodology to automate your software development lifecycle right out of the class. You will master configuration management; continuous integration deployment, delivery and monitoring using DevOps tools such as Git, Docker, Jenkins, Puppet and Nagios in a practical, hands-on and interactive approach. The DevOps training course focuses heavily on the use of Docker containers, a technology that is revolutionizing the way apps are deployed in the cloud today and is a critical skillset to master in the cloud age. After completing the DevOps training course you will achieve hands-on expertise in various aspects of the DevOps delivery model. The practical learning outcomes of this Devops training course are: An understanding of DevOps and the modern DevOps toolsets The ability to automate all aspects of a modern code delivery and deployment pipeline using: 1. Source code management tools 2. Build tools 3. Test automation tools 4. Containerization through Docker 5. Configuration management tools 6. Monitoring tools Who should take this course? DevOps career opportunities are thriving worldwide. DevOps was featured as one of the 11 best jobs in America for 2017, according to CBS News, and data from Payscale.com shows that DevOps Managers earn as much as $122,234 per year, with DevOps engineers making as much as $151,461. DevOps jobs are the third-highest tech role ranked by employer demand on Indeed.com but have the second-highest talent deficit. This DevOps training course will be of benefit the following professional roles: 1. Software Developers 2. Technical Project Managers 3. Architects 4. Operations Support 5. Deployment engineers 6. IT managers 7. Development managers You can learn more at https://www.simplilearn.com/cloud-computing/devops-practitioner-certification-training

2. What’s in it for you?
 Virtual Machine vs Docker
 What is Docker?
 Advantages of Docker
 How does Docker work?
 Components of Docker
 Advanced concepts in Docker
 Basic Docker commands
 Demo
Let’s get started

3. Virtual Machine vs Docker

4. Virtual Machine vs Docker
Docker Engine
Host OS
Infrastructure
App A
Bins/Libs
App C
Bins/Libs
Docker
Container 1
Hypervisor
Host OS
Infrastructure
App A
Bins/Libs
App B
Bins/Libs
Guest OS Guest OS
Virtual Machine
1
Virtual Machine
2
Virtual Machine
3
Bins/LibsBins/Libs
Guest OS
App B
Bins/Libs
Guest OS
Bins/Libs
App B
Bins/Libs
Docker
Container 2
Docker
Container 3

5. Virtual Machine vs Docker
Major differences are:
Virtual Machine
Memory usage

6. Virtual Machine vs Docker
Major differences are:
Virtual Machine
Performance
Memory usage

7. Virtual Machine vs Docker
Major differences are:
Virtual Machine
Portability
Performance
Memory usage

8. Virtual Machine vs Docker
Major differences are:
Virtual Machine
Boot-up time
Portability
Performance
Memory usage

9. Virtual Machine vs Docker
Virtual machines
4 GB
3 GB 2 GB
2 GB
1 GB
3 GB
Memory
7 GB
4 GB 4 GB
Occupied memory
Wasted memory
VM - Only 9 GB of memory is used
whereas the remaining 6 GB of
unused memory cannot be reused
App 1 App 2 App 3

10. Virtual Machine vs Docker
Virtual machines Docker
4 GB
3 GB 2 GB
2 GB
1 GB
3 GB
Memory
7 GB
4 GB 4 GB
4 GB
3 GB 2 GB
2 GB
1 GB
3 GB
7 GB
4 GB
4 GB
Occupied memory
Wasted memory
Docker - Only 9 GB of memory is
used whereas the remaining 6 GB
of memory can be reused for a
new container
VM - Only 9 GB of memory is used
whereas the remaining 6 GB of
unused memory cannot be reused
Memory
Occupied memory
Unused memory
App 1 App 2 App 3 App 1 App 2 App 3

11. Virtual Machine vs Docker
Virtual machines
VM - Running multiple virtual
machines leads to unstable
performance
Virtual machine
Host OS
Infrastructure
App A
Bins/Libs
Guest OS
App A
Bins/Libs
Guest OS
Virtual machine
Hypervisor

12. Virtual Machine vs Docker
Virtual machines Docker
Docker - Containers have a better
performance as they are hosted
on a single Docker engine
VM - Running multiple virtual
machines leads to unstable
performance
Docker
Host OS
Infrastructure
App A
Bins/Libs
App B
Bins/Libs
Docker
Container
Virtual machine
Hypervisor
Host OS
Infrastructure
App A
Bins/Libs
Guest OS
App A
Bins/Libs
Guest OS
Virtual machine
Docker
Container

13. Virtual Machine vs Docker
Virtual machines
VM - Portability issues while
executing applications in different
platforms
Software
Software works
on system A
The same
software doesn’t
work on system B

14. Virtual Machine vs Docker
Virtual machines Docker
Docker – Multiple software can be
encapsulated in a single container
and can be easily deployed to
different platforms
VM - Portability issues while
executing applications in different
platforms
Software
Software works
on system A
The same
software doesn’t
work on system B

15. Virtual Machine vs Docker
Virtual machines
VM – Takes long boot-up time
(minutes)

16. Virtual Machine vs Docker
Virtual machines Docker
Docker – Takes less boot-up time
(milliseconds)
VM – Takes long boot-up time
(minutes)

17. What is Docker?

18. What is Docker?
Docker is an OS-level virtualization software platform that enables developers and IT administrators to create, deploy
and run applications in a Docker Container with all their dependencies
Note: Docker Container is a lightweight software package that includes all the dependencies (frameworks, libraries, etc.) required to
execute an application
Docker Engine
Host OS
Infrastructure
App A
Bins/Libs
App C
Bins/Libs
Docker Container
1
App B
Bins/Libs
Docker Container
2
Docker Container
3

19. What is Docker?
Where is Docker used in DevOps?
Planning Planning TestingBuildingPlanning
Planning
Docker
Container
PlanningDeploymentPlanningTesting PlanningMonitoring

20. Advantages of Docker

21. Advantages of Docker
Rapid Deployment

22. Advantages of Docker
PortabilityRapid Deployment

23. Advantages of Docker
Better EfficiencyRapid Deployment Portability

24. Advantages of Docker
Faster
Configuration
Better EfficiencyRapid Deployment Portability

25. Advantages of Docker
Faster
Configuration
Better EfficiencyRapid Deployment
Scalability
Portability

26. Advantages of Docker
Faster
Configuration
Better EfficiencyRapid Deployment
Scalability Security
Portability

27. How does Docker work?

28. How does Docker work?
Server
Client
Docker CLI
Docker Daemon
REST API
Docker Engine Docker Engine
• Docker engine or Docker is a client server application that
builds and executes containers using Docker components

29. How does Docker work?
Server
Client
Docker CLI
Docker Daemon
REST API
Docker Engine Docker Engine
• Docker engine or Docker is a client server application that
builds and executes containers using Docker components
• REST API is a primary mode of communication between
Docker Client and Docker Daemon

30. How does Docker work?
Server
Client
Docker CLI
Docker Daemon
REST API
Docker Engine Docker Engine
• Docker engine or Docker is a client server application that
builds and executes containers using Docker components
• REST API is a primary mode of communication between
Docker Client and Docker Daemon
• Docker toolbox is used for older Windows and Mac systems
with the following features:Docker Toolbox
Docker engine Docker machine
Docker compose Kitematic

31. How does Docker work?
Server
Client
Docker CLI
Docker Daemon
REST API
Docker Engine Docker Engine
• Docker engine or Docker is a client server application that
builds and executes containers using Docker components
• REST API is a primary mode of communication between
Docker Client and Docker Daemon
• Docker toolbox is used for older Windows and Mac systems
with the following features:Docker Toolbox
Docker engine Docker machine
Docker compose Kitematic
But what are the
components of Docker?

32. Components of Docker

33. Components of Docker
Docker Registry
Docker Client and Server
Docker Images
Docker Container
Components of Docker

34. Docker Client
Docker Client and Server - Components of Docker
• Docker Client consist of the CLI command which is
used to issue commands to the Docker Daemon
Docker Client
Docker Host
Docker Daemon
Docker Registry
ImagesContainer
Container
REST API

35. Docker Client
Docker Client and Server - Components of Docker
• Docker Client consist of the CLI command which is
used to issue commands to the Docker Daemon
• Docker Client uses REST API to issue commands to
Docker Daemon through scripting or direct CLI
commands
Docker Client
Docker Host
Docker Daemon
Docker Registry
ImagesContainer
Container
REST API

36. Docker Client
Docker Client and Server - Components of Docker
• Docker Client consist of the CLI command which is
used to issue commands to the Docker Daemon
• Docker Client uses REST API to issue commands to
Docker Daemon through scripting or direct CLI
commands
• For example, when you use a docker pull command,
the client sends this command to daemon, which
performs the operation by interacting with other
components (Image, Container, Registry)
Docker Client
Docker Host
Docker Daemon
Docker Registry
ImagesContainer
Container
REST API

37. Docker Client and Server - Components of Docker
Docker Client
Docker Host
Docker Daemon
Docker Registry
ImagesContainer
Container
REST API
Docker Daemon (server)
• Docker Daemon is a server which interacts with the
operating system and performs all kind of services

38. Docker Client and Server - Components of Docker
Docker Client
Docker Host
Docker Daemon
Docker Registry
ImagesContainer
Container
REST API
Docker Daemon (server)
• Docker Daemon is a server which interacts with the
operating system and performs all kind of services
• The Docker Daemon listens for REST API request and
performs the operation

39. Docker Client and Server - Components of Docker
Docker Client
Docker Host
Docker Daemon
Docker Registry
ImagesContainer
Container
REST API
Docker Daemon (server)
• Docker Daemon is a server which interacts with the
operating system and performs all kind of services
• The Docker Daemon listens for REST API request and
performs the operation
• A command dockerd is used to start a Docker
Daemon

40. Docker Client and Server - Components of Docker
Docker Client
Docker Host
Docker Daemon
Docker Registry
ImagesContainer
Container
REST API
Docker Daemon (server)
• Docker Daemon is a server which interacts with the
operating system and performs all kind of services
• The Docker Daemon listens for REST API request and
performs the operation
• A command dockerd is used to start a Docker
Daemon
• Docker Host runs the Docker Daemon and Registry

41. Docker Image - Components of Docker
Docker Client and Server
Docker Image
Docker Registry
Docker Container

42. Docker Image - Components of Docker
Docker Image
• A Docker Image is a template of instructions which is
used to create containers
Docker
Container
Docker Image

43. Docker Image - Components of Docker
Docker Image
• A Docker Image is a template of instructions which is
used to create containers
• A Docker Image is built using a file called Docker File
Docker File
Docker
Container
Docker Image

44. Docker Image - Components of Docker
Docker Image
• A Docker Image is a template of instructions which is
used to create containers
• A Docker Image is built using a file called Docker File
• It is comprised of multiple layers
Layer 1
Base image layer (Ubuntu 18.04)
Layer 2
Image layers
(R/O)
Layer 3

45. Docker Image - Components of Docker
Docker Image
• A Docker Image is a template of instructions which is
used to create containers
• A Docker Image is built using a file called Docker File
• It is comprised of multiple layers
• By default, Docker Image starts with a base layer
Layer 1
Base image layer (Ubuntu 18.04)
Layer 2
Image layers
(R/O)
Layer 3

46. Docker Image - Components of Docker
Docker Image
• A Docker Image is a template of instructions which is
used to create containers
• A Docker Image is built using a file called Docker File
• It is comprised of multiple layers
• By default, Docker Image starts with a base layer
• Here, each layer depends on the layer below it
Layer 1
Base image layer (Ubuntu 18.04)
Layer 2
Image layers
(R/O)
Layer 3

47. Docker Image - Components of Docker
Docker Image
• A Docker Image is a template of instructions which is
used to create containers
• A Docker Image is built using a file called Docker File
• It is comprised of multiple layers
• By default, Docker Image starts with a base layer
• Here, each layer depends on the layer below it
• Image layers are created by executing each command
in the Dockerfile and are in the read-only format
Docker File
Layer 1
Base image layer (Ubuntu 18.04)
Layer 2
Image layers
(R/O)
Layer 3

48. Docker Image - Components of Docker
Docker Image
Consider an example of Docker Image
consisting of four layers

49. Docker Image - Components of Docker
Docker Image
Consider an example of Docker Image
consisting of four layers
FROM ubuntu:18.04
PULL . /file
RUN make /file
CMD python /file/file.py
• FROM - Creates a layer from the ubuntu:18.04
• PULL - Adds files from your Docker repository
• RUN - Builds your container
• CMD - Specifies what command to run within
the container
Image layers
(R/O)
Container layers (R/W)
PULL . /file
FROM Ubuntu 18.04
RUN make /file
CMD python /file/file.py

50. Docker Image - Components of Docker
Docker Image
• Whenever a user creates a container, a new layer is
formed on top of the image layers called container layer
Container based on the Ubuntu 18.04 image:
Container 2 Container 3
Container
layers (R/W)
Container
layers (R/W)
Container
layers (R/W)
Container 1
Layer 1
Base image layer (Ubuntu 18.04)
Layer 2
Image layers
(R/O)
Layer 3

51. Docker Image - Components of Docker
Docker Image
• Whenever a user creates a container, a new layer is
formed on top of the image layers called container layer
• Every container has a separate (R/W) container layer
and any modification in a container is reflected upon the
container layer alone
Container based on the Ubuntu 18.04 image:
Container 2 Container 3
Container
layers (R/W)
Container
layers (R/W)
Container
layers (R/W)
Container 1
Layer 1
Base image layer (Ubuntu 18.04)
Layer 2
Image layers
(R/O)
Layer 3

52. Docker Image - Components of Docker
Docker Image
• Whenever a user creates a container, a new layer is
formed on top of the image layers called container layer
• Every container has a separate (R/W) container layer
and any modification in a container is reflected upon the
container layer alone
• When a container is deleted, the top layer also gets
deleted
Container based on the Ubuntu 18.04 image:
Container 2 Container 3
Container
layers (R/W)
Container
layers (R/W)
Container
layers (R/W)
Container 1
Layer 1
Base image layer (Ubuntu 18.04)
Layer 2
Image layers
(R/O)
Layer 3

53. Docker Image
What should be done when there is a change
in image layer?
???
Images
Docker Image - Components of Docker

54. Docker Image
What should be done when there is a change
in image layer?
• Users can add a new layer to the base image
• But, users cannot modify any of the existing image
layers
Docker Image - Components of Docker

55. Docker Image - Components of Docker
DID YOU KNOW?
• Base layers are in the read only format
• The layers can be combined in a union file system to create a single image
• Union file system saves memory space by avoiding duplicating of files
• This allows a file system to appear as writable (but without modifying the file) which is
known as copy-on-write
???

56. Docker Image - Components of Docker
Docker Image
• Docker uses a copy-on-write strategy with both Docker
Images and Docker Containers
Images
Container
Container

57. Docker Image - Components of Docker
Docker Image
• Docker uses a copy-on-write strategy with both Docker
Images and Docker Containers
• CoW is a strategy to share and copy files for better
efficiency Files Files
Paste

58. Docker Image - Components of Docker
Docker Image
• Docker uses a copy-on-write strategy with both Docker
Images and Docker Containers
• CoW is a strategy to share and copy files for better
efficiency
• CoW strategy makes Docker efficient by reducing the
usage of disk space and increasing the performance of
container
Better Efficiency

59. Docker Client and Server
Docker Images
Docker Registry
Docker Container
Docker Registry - Components of Docker

60. Docker Registry
• Docker Registry is a service to host and distribute
Docker Images among users
• Docker has its own cloud based Registry called Docker
Hub where users store and distribute container images
Docker Registry
Registry
Repository
Tag name
6789sfdd…
Docker Registry - Components of Docker

61. Docker Registry - Components of Docker
Docker Registry
Docker Registry
Registry
Repository
Tag name
6789sfdd…
• Docker Registry is a service to host and distribute
Docker Images among users
• Repository is a collection of Docker Images

62. Docker Registry - Components of Docker
Docker Registry
Docker Registry
Registry
Repository
Tag name
Note: A tag is a alphanumeric identifier attached to an image
6789sfdd…
• Docker Registry is a service to host and distribute
Docker Images among users
• Repository is a collection of Docker Images
• In Registry, a user can distinguish between Docker
Images with their tag names

63. Docker Registry - Components of Docker
Docker Registry
• Docker Registry is a service to host and distribute
Docker Images among users
• Repository is a collection of Docker Images
• In Registry, a user can distinguish between Docker
Images with their tag names
• Docker has its own cloud based Registry called Docker
Hub where users store and distribute container images
Docker Registry Docker Hub

64. Docker Registry - Components of Docker
Docker Registry
• Docker Registry has public and private repositories
Docker Registry
Public
Repository
Private

65. Docker Registry - Components of Docker
Docker Registry
• Docker Registry has public and private repositories
• In Registry, push and pull commands are used to interact
with the Docker Images
Docker Registry
Push
Pull

66. Docker Registry - Components of Docker
Docker Registry
• Docker Registry has public and private repositories
• In Registry, push and pull commands are used to interact
with the Docker Images
• Pull command – It pulls (retrieves) a Docker Image from
the Docker Registry
Docker Registry
Push
Pull

67. Docker Registry - Components of Docker
Docker Registry
• Docker Registry has public and private repositories
• In Registry, push and pull commands are used to interact
with the Docker Images
• Pull command – It pulls (retrieves) a Docker Image from
the Docker Registry
• Push command – It pushes (stores) a Docker Image in
Docker Registry
Docker Registry
Push
Pull

68. Docker Registry - Components of Docker
DID YOU KNOW?
In Docker Registry, deleting a repository is not a reversible action

69. Docker Container - Components of Docker
Docker Client and Server
Docker Images
Docker Registry
Docker Container

70. Docker Container
• Docker Container is an executable package of
application and its dependencies together
Docker Container - Components of Docker
Application Dependencies+ =
Docker Container

71. Docker Container
• Docker Container is an executable package of
application and its dependencies together
• Since it’s light-weight, it can be easily deployed and
executed on other computer environments regardless
of their host OS/ configurations
Docker Container - Components of Docker
portable
Lightweight

72. Docker Container
• Docker Container is an executable package of
application and its dependencies together
• Since it’s light-weight, it can be easily deployed and
executed on other computer environments regardless
of their host OS/ configurations
• Docker Containers run applications in isolation and
also share the OS kernel with other containers
Application runs in isolation
Docker Container - Components of Docker

73. Docker Container
• Here, data volumes can be shared and reused among
multiple containers
4 GB
3 GB 2 GB
2 GB
1 GB
3 GB
7 GB
4 GB
4 GB
Memory
Occupied memory
Reused memory
Docker Container - Components of Docker
App 1 App 2 App 3

74. Docker Container
• Here, data volumes can be shared and reused among
multiple containers
• It is built using Docker Images
Docker Images
Docker Container - Components of Docker

75. Docker Container
• Here, data volumes can be shared and reused among
multiple containers
• It is built using Docker Images
• Docker run command builds a container
Docker
Container
Docker Image
Docker Container - Components of Docker

76. Docker Container
Consider a basic example of Docker
run command for starting a
single redis container
$ Docker run redis
Docker Container - Components of Docker

77. Docker Container
Consider a basic example of Docker
run command for starting a
single redis container
$ Docker run redis
Suppose a user runs $ Docker run redis
command, the following happens:
Docker Container - Components of Docker

78. Docker Container
Consider a basic example of Docker
run command for starting a
single redis container
$ Docker run redis
Suppose a user runs $ Docker run redis
command, the following happens:
• In case you don’t have a Docker Image
locally, the Docker pulls the image from your
Registry
Docker Container - Components of Docker

79. Docker Container
Consider a basic example of Docker
run command for starting a
single redis container
$ Docker run redis
Suppose a user runs $ Docker run redis
command, the following happens:
• In case you don’t have a Docker Image
locally, the Docker pulls the image from your
Registry
• Now, Docker creates a new container redis
from the existing Docker Image
Docker Container - Components of Docker

80. Docker Container
Consider a basic example of Docker
run command for starting a
single redis container
$ Docker run redis
Suppose a user runs $ Docker run redis
command, the following happens:
• In case you don’t have a Docker Image
locally, the Docker pulls the image from your
Registry
• Now, Docker creates a new container redis
from the existing Docker Image
• Docker creates a container layer of read-
write filesystem
Read-only
Docker Container - Components of Docker

81. Docker Container
How are containers lightweight?
???
Docker Container - Components of Docker

82. Docker Container
How are containers lightweight?
???
Docker Containers are lightweight
because they do not require an extra
layer of a hypervisor and run directly
on the host operating system
Docker Container - Components of Docker

83. Advanced concepts in Docker

84. Advanced concepts in Docker
Docker Compose
Docker Swarm

85. Docker Compose
Docker Compose
• Docker Compose is used for running multiple containers
as a single service
{Containers Docker
Compose file

86. Docker Compose
Docker Compose
• Docker Compose is used for running multiple containers
as a single service
• Here, each container runs in isolation but can interact
with each other
{Containers Docker
Compose file

87. Docker Compose
Docker Compose
• Docker Compose is used for running multiple containers
as a single service
• Here, each container runs in isolation but can interact
with each other
• All Docker Compose files are YAML files
Docker
Compose file
YAML format

88. Docker Compose
Docker Compose
For example:
If you have an application which requires Apache server and
MySQL database, you could create one Docker Compose
file which can run both containers as a service without the
need to start each one separately
{Containers Docker
Compose file

89. Docker Swarm
Docker Compose
Docker Swarm

90. Docker Swarm
Docker Swarm
Docker Swarm
• Docker Swarm is a service for containers which allows IT
administrators and developers to create and manage a
cluster of swarm nodes within the Docker platform Node 1
Node 3
Node 3
Node 4
Node 5
Node 6
Note: A swarm node is an individual Docker Engine participating in the swarm

91. Docker Swarm
Docker Swarm
Docker Swarm
• Docker Swarm is a service for containers which allows IT
administrators and developers to create and manage a
cluster of swarm nodes within the Docker platform
• Each node of Docker Swarm is a Docker Daemon and all
Docker Daemons interact using the Docker API
Node 1
Node 3
Node 3
Node 4
Node 5
Node 6

92. Docker Swarm
Docker Swarm
A swarm consists of two types of nodes:
Manager node and worker node
Node 03
Worker
Node 01
Worker nodes receive and
execute tasks from
manager node
Manager node maintains
cluster management
tasks
Manager Node
Container
Container Container
Container Container
Container
Worker
Node 02
Worker
Node 03

93. Basic Docker commands

94. Basic Docker commands
Install Docker on your system
yum install Docker

95. Basic Docker commands
Install Docker on your system
yum install Docker
Start the Docker Daemon
systemctl start Docker

96. Basic Docker commands
Install Docker on your system
yum install Docker
Start the Docker Daemon
systemctl start Docker
Command to remove Docker Image
Docker rmi ImageID

97. Basic Docker commands
Install Docker on your system
yum install Docker
Start the Docker Daemon
systemctl start Docker
Command to remove Docker Image
Docker rmi ImageID
Command to download an image Docker
pull image_name

98. Basic Docker commands
Install Docker on your system
yum install Docker
Start the Docker Daemon
systemctl start Docker
Command to remove Docker Image
Docker rmi ImageID
Command to download an image Docker
pull image_name
Command to run an image
Docker run <image-id>

99. Basic Docker commands
Install Docker on your system
yum install Docker
Start the Docker Daemon
systemctl start Docker
Command to remove Docker Image
Docker rmi ImageID
Command to download an image Docker
pull image_name
Command to run an image
Docker run <image-id>
Command to pull a Docker Image from a
Docker hub
Docker pull <image-name:tag>

100. Basic Docker commands
Install Docker on your system
yum install Docker
Start the Docker Daemon
systemctl start Docker
Command to remove Docker Image
Docker rmi ImageID
Command to download an image Docker
pull image_name
Command to run an image
Docker run <image-id>
Command to pull a Docker Image from a
Docker hub
Docker pull <image-name:tag>
Command to build an image from a Dockerfile
Docker build –t[image name]:tag

101. Basic Docker commands
Install Docker on your system
yum install Docker
Start the Docker Daemon
systemctl start Docker
Command to remove Docker Image
Docker rmi ImageID
Command to download an image Docker
pull image_name
Command to run an image
Docker run <image-id>
Command to pull a Docker Image from a
Docker hub
Docker pull <image-name:tag>
Command to build an image from a Dockerfile
Docker build –t[image name]:tag
Command to shut down the container Docker
stop container_ID

102. Basic Docker commands
Install Docker on your system
yum install Docker
Start the Docker Daemon
systemctl start Docker
Command to remove Docker Image
Docker rmi ImageID
Command to download an image Docker
pull image_name
Command to run an image
Docker run <image-id>
Command to pull a Docker Image from a
Docker hub
Docker pull <image-name:tag>
Command to build an image from a Dockerfile
Docker build –t[image name]:tag
Command to shut down the container Docker
stop container_ID
Command to access a running container
Docker exec it container_ID bash

103. Demo

104. Other fields that use Blockchain
Blockchain has been used in other industries as well. Some examples of this are:
To ease the verification
of documents
To stop music piracy and to
compensate artists for
purchased songs
Data integrity can be
guaranteed. There cannot
be a single point of failure
Verification of identity of
employee, history, etc.
Payment and benefit
process validation
Travel Music Cybersecurity Human Resources