systemR is an open source packages to interact with the operation system (OS) on the shell level.
Installing directly from Github requires some helper packages. The easies way to setup systemR is to source the following «init.R» script and then install and run the package with the packagesGithub function.
source("https://rawgit.com/greenore/initR/master/init.R")
packagesGithub("systemR", repo_name="greenore")
source(pipe(paste("wget -O -", "https://rawgit.com/greenore/initR/master/init.R")))
packagesGithub("systemR", repo_name="greenore")