Hello guys!
I have a new erro when I has install n8n, whats i need to do?
Tks
Hi @Sarreta, welcome to the community 
This seems to be a problem with installing docker rather than with installing n8n. You might want to check out Docker Engine installation overview | Docker Documentation for more detailed instructions on how to install Docker and check with their community/support team if you still run into any issues after following these.
Ubuntu-specific instructions are available on Install Docker Engine on Ubuntu | Docker Documentation