ssh_vps_access.sh

# On remote host do:
# ------------------

# Add user
sudo adduser <USER> sudo
# Or:
sudo adduser <USER>
sudo usermod -a -G sudo <USER>

# Change ssh configuration
sudo nano /etc/ssh/sshd_config
# Port NNN
# PermitRootLogin no
# AllowUsers <USER>
sudo service ssh reload

# On local host do:
# ------------------

# Generate key
ssh-keygen -t rsa -b 4096 -f <KEY_FILE>
# Copy public key to remote host
ssh-copy-id -i <KEY_FILE> <USER>@<HOST>
# Connect to remote host
ssh -i <KEY_FILE> <USER>@<HOST>