Hot code loading
To change a running erlang system
Start erlang as a node on your host
This is my /etc/X11/Xsession.d/80zhone. As you can see the erlang node's got a name "-name email@example.com" (a running erlang virtual machine is called an erlang node). And it's got a cookie "-setcookie SFEWRG34AFDSGAFG35235". This is all that's needed on the neo.
#!/bin/sh -e #zhone > /tmp/zhone.log 2>&1 & /home/root/cean/start.sh -setcookie SFEWRG34AFDSGAFG35235 -name firstname.lastname@example.org -noshell -pa /home/root/trunk -s main start > debug.txt renice -3 $! exit 0
Every erlang node in your network should have a unique name, and a common cookie. Start an erlang node on your host PC with a unique name and the common cookie:
erl -setcookie SFEWRG34AFDSGAFG35235 -name 'email@example.com'
From your host erlang console try
The response should be 'pong' if you have a successful connection - if not, the response is 'pang'
Then try the shell command
The response should be a list of all known nodes in your network.
HotLoad the code
To carry out Hot Code Loading type - on your host erlang console - and make sure erlang can find your module 'your_modulename':
Substitute your_modulename with the name of the module you want to load into the virtual machine on your neo. The response should be 'abcast' if sucessful. If not the response is 'error'.
The ping command is only necessary the first time to let your host node find your neo node. When you are finished, don't forget to copy the compiled erlang file to your neo, hot code loading does not copy your beam file to the file system.