Docker "command not found" after reinstallation

Question

I am using Mint 19.2, based on Ubuntu 18.

I uninstalled using apt purge & then deleting the folder. Finally, reinstalled Docker using the commands from the official site.

However when I run the command docker -v or sudo docker -v, I get the response:

command not found: docker

When I run the command: sudo apt-get install docker-ce docker-ce-cli containerd.io, I get:

Reading package lists... Done
Building dependency tree       
Reading state information... Done
containerd.io is already the newest version (1.2.10-3).
docker-ce-cli is already the newest version (5:19.03.4~3-0~ubuntu-bionic).
docker-ce is already the newest version (5:19.03.4~3-0~ubuntu-bionic).
0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade.

How can I rectify this & make docker accessible globally?

Answer 1

I think the issue was that there was conflict & the system had'nt removed docker properly, even though I followed the instructions as per the official site.

However, what worked for me was purging everything docker related.

sudo apt-get purge docker-ce docker-ce-cli containerd.io docker-compose

Then I removed the docker folder from /var/lib folder.

Rebooted for surety. Then reinstalled as per the official docs again.

And after reboot again, it worked.

Dont forget, docker-compose needs to be installed separately.