Enable Remote SSH

See: https://www.raspberrypi.org/documentation/remote-access/ssh/

Raspberry Pi

Via GUI:

1. Launch Raspberry Pi Configuration from the Preferences menu
2. Navigate to the Interfaces tab
3. Select Enabled next to SSH
4. Click OK

Via Config:

1. Enter sudo raspi-config in a terminal window
2. Select Interfacing Options
3. Navigate to and select SSH
4. Choose Yes
5. Select Ok
6. Choose Finish

Via Service:

sudo systemctl enable ssh
sudo systemctl start ssh

Windows (via Putty)

1. Download Putty client: greenend.org.uk
2. Verify Setup: Specify Host, click Open
3. Set KeepAlive: Connection \ Seconds between keepalives: 30
4. Save Session