more readme

README.md

@@ -7,3 +7,35 @@ A declarative manager for Linux network namespaces.
 - Fully declarative configuration
 - Hot reloading of configuration
 - Port forwarding into the namespace
+
+## Usage
+
+### Daemon
+
+```shell
+netnsd daemon [--config <config.toml>]
+```
+
+Start the netnsd daemon, applying the configured namespace configuration and
+running any proxies.
+
+You can tell the daemon to reload the configuration with `pkill -sighup netnsd`.
+
+Note that, to minimize interruption of anything using the namespaces, stopping
+the daemon will not remove the created namespaces.
+
+### Up
+
+```shell
+netnsd up [--config <config.toml>]
+```
+
+Applying the configured namespace and exit.
+
+### Down
+
+```shell
+netnsd down
+```
+
+Remove all namespaces created by netnsd and exit.