Hi Hana!
Sorry for the delay. The forum did not send me a notification.
Are you using the modified SQLite shell available in the download section?
Note that with litesync we use the terms "primary" and "secondary" nodes, instead of master and slave.
This is an example configuration for the primary node:
"file:main.db?node=primary&bind=tcp://0.0.0.0:1234"
And for a secondary node in the same device:
"file:copy.db?node=secondary&connect=tcp://127.0.0.1:1234"