I'm trying to install ROracle package on a unix box. The package gets installed properly. But library(ROracle) does not work fine with the error
library(ROracle)
Error in dyn.load(file, DLLpath = DLLpath, ...) :
unable to load shared object '/u01/group1/home/oracle/R/x86_64-redhat-linux-gnu-library/3.1/ROracle/libs/ROracle.so':
libclntsh.so.11.1: cannot open shared object file: No such file or directory
Error: package or namespace load failed for ‘ROracle’
The package installs fine from the command line , but just does not work in R studio. I went through lot of threads in forum and lot of them suggested to export the LD_LIBRARY_PATH and reset it.infact i went ahead and copied all the R system variables from command line into R Studio. But it still does not work out fine.
One thing i have also noticed is that the R system variables change every time i restart R studio. Can it be the problem that R studio is not taking path values correctly.
Seems that the problem is caused by the $LD_LIBRARY_PATH environment variable not being set in a way that is system-wide. Unlike other environment variables, $LD_LIBRARY_PATH needs special treatment (see the Ubuntu Help page and search for ld.so.conf.d)
I was able to solve this by setting the $LD_LIBRARY_PATH as per comment 15:
echo "/usr/lib/oracle/11.2/client64/lib" | sudo tee /etc/ld.so.conf.d/oracle.conf
Change the echo statement to where your Oracle Instant Client libraries are stored. (Mine could be found by running echo $OCI_LIB.
Then update the cache:
sudo ldconfig -v
Then open RStudio, execute library("ROracle") and it should work.
I had the exact same problem, and I have just resolved it thanks to a conference with some very kind and helpful Oracle personnel.
We need to include the following line in /etc/rstudio/rserver.conf file (which by default is empty):
rsession-ld-library-path=/usr/lib64/R/lib:/u01/app/oracle/product/12.1.0.2/dbhome_1/lib
i.e. the R & Oracle home directories:
$ echo $R_HOME
/usr/lib64/R
$ echo $ORACLE_HOME
/u01/app/oracle/product/12.1.0.2/dbhome_1
You have to restart the RStudio server after modifying the configuration file.
I have checked this only with RStudio server, so not sure if it is necessary for RStudio Desktop, too...
See here for more details (although it refers to Oracle R Enterprize, it is also applicable to vanilla R).
来源：https://stackoverflow.com/questions/28025911/roracle-not-working-in-r-studio