security note (ssh simple optim + fail2ban)

[Alex Boulangé]

for "advanced" or paranoid user like me, a little fine tuning note on ssh, could be a good thing:
2 steps:

copying public key to umbrel

ssh-copy-id [e-mail]

then configuring ssh to disable login by password

sudo nano /etc/ssh/sshd_config
and then changing
#PasswordAuthentication yes
to
PasswordAuthentication no

And maybe for those who don't want to touch this, at least installing fail2ban
sudo apt install fail2ban