• Run ycqlsh to connect to the service.

You can do this as shown below.

$ ./bin/ycqlsh

Connected to local cluster at 127.0.0.1:9042.
[ycqlsh 5.0.1 | Cassandra 3.9-SNAPSHOT | CQL spec 3.4.2 | Native protocol v4]
Use HELP for help.
ycqlsh>

• Run a YCQL command to verify it is working.

ycqlsh> describe keyspaces;

system_schema  system_auth  system