I use R 2.13 from the CRAN apt repo for Ubuntu 10.04, and I\'m trying to install Deducer, which requires JGR/rJava, but rJava refuses to build/install, complaining about being u
DWright is right..an alternative instead export it every time than you start R is locate your java path
sudo locate libjvm.so
and add ir to ldpaths
sudo gedit /etc/R/ldpaths i.e ${JAVA_HOME=/usr/java/jdk1.7.0_07/jre}