Error saying E This command can only be used by root while installing docker

Question

I am trying to install docker with these commands:

apt-get install apt-transport-https ca-certificates curl software-properties-common -y
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add -

I get the following error:

E: This command can only be used by root.

I tried using sudo like this:

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

Still the same error.

Comments

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

Answer 1

Try executing the following command:

sudo su 

and then execute the command:

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