Update Install-Docker-manual.txt

Author: lerndevops

docker/install/Install-Docker-manual.txt

@@ -1,9 +1,10 @@
 Install Docker on Ubuntu:
 
+	sudo su -
 	sudo apt-get remove docker docker-engine docker.io containerd runc
 	sudo apt-get update
 	sudo apt-get install -y apt-transport-https ca-certificates curl gnupg-agent software-properties-common
-	curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
+	sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
 	sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
 	sudo apt-get update
 	sudo apt-get install -y docker-ce docker-ce-cli containerd.io