Googlielmo's blog

An appendix to complete the tutorial about the Shiny Server (OS edition) installation: a quick reference to its configuration. The configuration file of a Shiny Server is stored in the /etc/shiny-server/shiny-server.conf file. It comes in a format like this: run_as shiny; server {   listen 3838;   location / {     site_dir /srv/shiny-server;         log_dir /var/log/shiny-server;         directory_index on;   } } Here's the explanation of the parameters: run_as : to set the system user to run R/Shiny applications. Don't use root. server : this block defines a single server details (see the following properties). listen : the server listening port. The default value is 3838. location : defines a location available at the base URL. site_dir : the directory hosting the Shiny web apps. log_dir : the directory where the Shiny Server logs are stored. directory_index : to enable ( on ) ...

RHadoop ( https://github.com/RevolutionAnalytics/RHadoop/wiki ) is a collection of five R packages (rhdfs, rmr2, rhbase, ravro, plyrmr) that allow users to manage and analyze data with Hadoop. Running any MapReduce function, also this simple one     from.dfs(mapreduce(to.dfs(1:100)))  through RHadoop on Linux servers you could face this exception: 2015-10-20 08:39:41,722 ERROR [main] org.apache.hadoop.streaming.PipeMapRed: configuration exception java.io.IOException: Cannot run program "Rscript": error=2, No such file or directory     at java.lang.ProcessBuilder.start(ProcessBuilder.java:1059)     at org.apache.hadoop.streaming.PipeMapRed.configure(PipeMapRed.java:209)     at org.apache.hadoop.streaming.PipeMapper.configure(PipeMapper.java:66)     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.jav...