The Replication Server installation and configuration guides for your platform describe how you use rs_init to add databases.
When you add a database, you specify:
Replication Server name
Replication Server System Administrator user name and password
Adaptive Server name
Adaptive Server System Administrator user name and password
Database name
Whether the database requires a RepAgent
Maintenance user name and password
Database Owner user name and password
Whether the physical connection is for an existing logical connection
