Install Docker in ubuntu at AWS EC2


 1. get access of root user , by default root username is ubuntu 

at terminal 

execute following command

sudo su

2.  update the packages 

apt-get update

3. set up docker app repository

# Add Docker's official GPG key:

sudo apt-get install ca-certificates curl gnupg

sudo install -m 0755 -d /etc/apt/keyrings

curl -fsSL | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg

sudo chmod a+r /etc/apt/keyrings/docker.gpg

# Add the repository to Apt sources:

echo \

  "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] \

  "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \

  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

4. Upgrade the packages if available

apt-get upgrade -y

5. Verify docker 

docker -v

Getting Info...

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