Linux - Error loading rJava in Rstudio: libjvm.so: missing?

Question

i just installed Rstudio and wanted some packaes to use, im using linux mint, when i tried to install the xlsx package give an error related to rjava, so i installed the rjava package, but it cant be loaded, instead i get this error:

>library("rJava", lib.loc="/usr/lib/R/site-library")
Error : .onLoad failed in loadNamespace() for 'rJava', details:
call: dyn.load(file, DLLpath = DLLpath, ...)
error: unable to load shared object '/usr/lib/R/site-
library/rJava/libs/rJava.so':
libjvm.so: cannot open shared object file: No such file or directory
Error: package or namespace load failed for ‘rJava’
>detach("package:rJava", unload=TRUE)
Error in detach("package:rJava", unload = TRUE) : invalid 'name' 
argument

I tried R CMD javareconf several times, but still no clue of the problem

Answer 1

You may want to locate the library, you can use the whereis command or look into standard path which are : /usr/lib/jvm/java-7-oracle/lib/amd64 /usr/lib/jvm/java-7-oracle/jre/lib/amd64/server

Once it's located, copy its folder's path.

Then add it to the LD_LIBRARY_PATH environment variable located in ~/.profile (create the file if needed). export LD_LIBRARY_PATH=/usr/lib/jvm/java-7-oracle/lib/amd64:/usr/lib/jvm/java-7-oracle/jre/lib/amd64/server

If you already have a LD_LIBRARY_PATH set you may want to keep it, so echo $LD_LIBRARY_PATH and add its content into the ~/.profile file.

You can reboot to reload the .profile, or you can just source ~/.profile form a terminal.

To conclude just sudo R CMD javareconf.