I keep having to look this up every time I set up a new machine.
So here are the steps for future me:
1# Create a user and add to the sudo group
2adduser galdin
3usermod -aG sudo galdin
4
5# Setup SSH
6su - galdin
7mkdir -p ~/.ssh
8chmod 700 ~/.ssh
9
10# Exit the ssh session
11# and copy the local SSH key over
12exit
13exit
14ssh-copy-id galdin@
15
16# Log in again!
17ssh galdin@