Here i what I did.

1) I used the adapters.xml bellow:

<?xml version="1.0"?>

<adapters_conf id="PROXY_HELLOWORLD_SOCKETS">

<metadata_provider>
<adapter_class>com.lightstreamer.adapters.metadata .LiteralBasedProvider</adapter_class>
</metadata_provider>

<data_provider>
<adapter_class>com.lightstreamer.adapters.remote.d ata.NetworkedDataProvider</adapter_class>
<param name="request_reply_port">7001</param>
<param name="notify_port">7002</param>
<param name="timeout">36000000</param>
</data_provider>

</adapters_conf>

2) Copied everything to the proper directories

[/usr/Lightstreamer/bin/unix-like]>ls -l ../../adapters/HelloWorldSockets/
total 8
-rw-r--r-- 1 root wheel 503 Sep 14 09:10 adapters.xml
drwxr-xr-x 2 root wheel 512 Sep 14 09:12 lib

[/usr/Lightstreamer/bin/unix-like]>ls -l ../../adapters/HelloWorldSockets/lib/
total 120
-rw-r--r-- 1 root wheel 120535 Sep 14 09:12 ls-proxy-adapters.jar

When I start lightstreamer, I get this:

[/usr/Lightstreamer/bin/unix-like]>./start.sh
Java environment:
JAVA_HOME = "/usr/local/openjdk8"
JAVA_OPTS = "-server -XX:MaxGCPauseMillis=1000"

Setting file descriptor limit to 117270
Configured file descriptors, soft limit: 117270
Configured file descriptors, hard limit: 117270

Lightstreamer Server directory:
LS_HOME = "/usr/Lightstreamer"

Lightstreamer Server main configuration file:
LS_CONFIG = "/usr/Lightstreamer/conf/lightstreamer_conf.xml"

Starting Lightstreamer Server...
Please check logs for detailed information.
15.Sep.15 16:40:51,551 < INFO> Lightstreamer Server 6.0.1 build 1780
15.Sep.15 16:40:51,591 < INFO> Lightstreamer Server starting in Moderato edition.
15.Sep.15 16:40:51,753 < WARN> Only minimal JMX management support is available with the current license.
15.Sep.15 16:40:51,858 < INFO> Started RMI server for JMX on port 8888.
15.Sep.15 16:40:52,110 < INFO> Bound RMI Connector for JMX on port 8888 (communication on port 8888).
15.Sep.15 16:40:52,211 < INFO> Bound RMI Connector for Platform mbeans on port 8888 (communication on port 8888).
15.Sep.15 16:40:52,221 < INFO> SERVER pool size set by default at 10.
15.Sep.15 16:40:52,348 < INFO> Pump pool size set by default at 4.
15.Sep.15 16:40:52,466 < INFO> data_provider element without name attribute; using DEFAULT as the default name.
15.Sep.15 16:40:52,500 < INFO> data_provider element without name attribute; using DEFAULT as the default name.
15.Sep.15 16:40:52,503 < INFO> Loading Metadata Adapter for Adapter Set WELCOME
15.Sep.15 16:40:52,503 < INFO> Loading Metadata Adapter for Adapter Set MARKETDEPTH
15.Sep.15 16:40:52,504 < INFO> Loading Metadata Adapter for Adapter Set PROXY_HELLOWORLD_SOCKETS
15.Sep.15 16:40:52,521 < INFO> Finished loading Metadata Adapter for Adapter Set PROXY_HELLOWORLD_SOCKETS
15.Sep.15 16:40:52,543 < INFO> Loading Data Adapter PROXY_HELLOWORLD_SOCKETS.DEFAULT
15.Sep.15 16:40:52,563 <ERROR> Can't find data adapter class.
java.lang.ClassNotFoundException: com.lightstreamer.adapters.remote.data.NetworkedDa taProvider
at java.net.URLClassLoader.findClass(URLClassLoader.j ava:381) ~[na:1.8.0_45]
at java.lang.ClassLoader.loadClass(ClassLoader.java:4 24) ~[na:1.8.0_45]
at com.lightstreamer.g.d.an.loadClass(an.java) ~[na:na]
at com.lightstreamer.init.b.a(b.java) [ls-bootstrap.jar:na]
at com.lightstreamer.g.d.f.a(f.java) [lightstreamer.jar:na]
at com.lightstreamer.g.d.f.a(f.java) [lightstreamer.jar:na]
at com.lightstreamer.g.d.ak.b(ak.java) [lightstreamer.jar:na]
at com.lightstreamer.o.b.al.run(al.java) [lightstreamer.jar:na]
15.Sep.15 16:40:52,564 <ERROR> Error in task Init adapter set PROXY_HELLOWORLD_SOCKETS: com.lightstreamer.o.b.ae: Error in task Init for PROXY_HELLOWORLD_SOCKETS.DEFAULT.
15.Sep.15 16:40:52,567 <ERROR> Error while loading the Adapters: LoadingException: Error in Adapter loading.
15.Sep.15 16:40:52,567 <ERROR> Error while loading the Adapters: Error in Adapter loading.
15.Sep.15 16:40:52,567 <FATAL> Adapters initialization failed.

What should I do?

Thanks,

Mario Lobo