# Usage

Yanic provides several commands:

* `import`
* `query`
* `serve`

## Import

### RRD-File
Warning, just tested with olddata.rrd from Freifunk Bremen generated by detailed-rrds branch of [ffmap-backend](https://github.com/ffnord/ffmap-backend/tree/detailed-rrds)

```
Usage:
  yanic import <file.rrd> [flags]

Examples:
  yanic import --config /etc/yanic.toml olddata.rrd

Flags:
  -c, --config string   Path to configuration file (default "config.toml")
  -h, --help            help for import
```

### Firstseen
To import firstseen values there is a little script in contrib:

```
/opt/go/src/github.com/FreifunkBremen/yanic/contrib/yanic-import-timestamp -n path/to/nodes_old.json -s state.json /var/lib/yanic/state.json
```

On a productive system @ once:

```
systemctl stop yanic; cp /var/lib/yanic/state.json /var/lib/yanic/state.bak; /opt/go/src/github.com/FreifunkBremen/yanic/contrib/yanic-import-timestamp -n path/to/nodes_old.json -s /var/lib/yanic/state.json; systemctl start yanic;
```

## Serve
runs yanic in collector-modus to genereate files (e.g. for meshviewer) and save values in databases

from shell

```
Usage:
  yanic serve [flags]

Examples:
  yanic serve --config /etc/yanic.toml

Flags:
  -c, --config string   Path to configuration file (default "config.toml")
  -h, --help            help for serve
```

or run as [daemon]({{site.baseurl}}/docs/install.html)


## Query

Send a single request and show response like `gluon-neighbour-info` on gluon.

e.g.  to check the right interface

```
Usage:
  yanic query <interface> <destination> [flags]

Examples:
  yanic query wlan0 "fe80::eade:27ff:dead:beef"

Flags:
  -h, --help       help for query
      --wait int   Seconds to wait for a response (default 1)
```