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add Debian building requirements

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Jan-Piet Mens
2015-09-26 13:50:37 +02:00
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README.md
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@@ -552,8 +552,24 @@ server {
### The LMDB database
`ocat --load` and `ocat --dump` can be use to load and dump the lmdb database respectively. There is some support for loading/dumping named databases using `--load=xx` or `--dump=xx` to specify the name. Use the mdb utilities to actually perform backups of these. _load_ expects key/value strings in pairs, separated by exactly one space. If the value is the string `DELETE`, the key is deleted from the database.
`ocat --load` and `ocat --dump` can be use to load and dump the lmdb database respectively. There is some support for loading/dumping named databases using `--load=xx` or `--dump=xx` to specify the name. Use the mdb utilities to actually perform backups of these. _load_ expects key/value strings in pairs, separated by exactly one space. If the value is the string `DELETE`, the key is deleted from the database, which allows us to, say, remove a whole bunch of geohash prefixes in one go (but be careful doing this):
```bash
ocat --dump |
grep xxyz |
awk '{printf "%s DELETE\n", $1; }' |
ocat --load
```
#### `topic2tid`
This named lmdb database is keyed on topic name (`owntracks/jane/phone`). If the topic of an incoming message is found in the database, the `tid` member in the JSON payload is replaced by the value of this key.
## Prerequisites for building
### Debian
```
apt-get install build-essential linux-headers-$(uname -r) libcurl4-openssl-dev libmosquitto-dev liblua5.2-dev
```