Install dragit
From Wiki
Before any operations, you need to log into the Raspberry Pi remotely first. Here's how:
1． Get the IP address of the Raspberry Pi:
https://www.raspberrypi.org/documentation/remote-access/ip-address.md
2． Log in with the IP address, by ssh or VNC:
For ssh: https://www.raspberrypi.org/documentation/remote-access/ssh/README.md
For VNC: https://www.raspberrypi.org/documentation/remote-access/vnc/README.md
