# datum-cli
`datum-cli` provides the `datum` command-line client for `datum-agent`'s Datum Control Protocol
(DCP). It talks to the loopback TCP development listener by default and can use QUIC with mTLS when
client and CA certificates are supplied.
```sh
datum ps
datum ps --cluster
datum nodes
datum start empty --name ingest
datum submit --cluster --factory empty --name ingest --role worker
datum submit --cluster --factory empty --name pinned --node node-2
datum status ingest
datum status --cluster ingest
datum drain ingest
datum drain --cluster ingest
datum metrics ingest --follow
```
Use `--json` for machine-readable output.