Dear list members, I am a total newcomer to linux and would like to have some help in the installation of bioconductor packages on my newly installed ubuntu 11.10 system. I have installed R and many of the CRAN packages. I am having some difficulties in installing the EBImage package on running the command - bioClite('EBImage'). The ImageMagick installation is recognized alright, but I get the following error about the gtk package : installing *source* package ???EBImage??? ... checking for Magick-config... yes * found ImageMagick version 6.7.3 Q16 * found ImageMagick includes in -I/usr/local/include/ImageMagick checking for pkg-config... yes Package gtk+-2.0 was not found in the pkg-config search path. Perhaps you should add the directory containing `gtk+-2.0.pc' to the PKG_CONFIG_PATH environment variable No package 'gtk+-2.0' found * GTK+2.0 not found: compiling without GTK+ support Running gtk-demo on the terminal confirms that gtk is not installed. Now, I would like how I should install the gtk package. When I look at Synaptic, I see a whole lot of gtk programs. Which one should I choose? What surprises me is that I have RGtk2 and rattle packages installed. I get no error message on loading RGtk2. How is this possible without a gtk installation? I would appreciate getting some instructions on installing gtk. Thanking you, Ravi -- output of sessionInfo(): > sessionInfo() R version 2.14.0 (2011-10-31) Platform: i686-pc-linux-gnu (32-bit) locale: [1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C [3] LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8 [5] LC_MONETARY=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8 [7] LC_PAPER=C LC_NAME=C [9] LC_ADDRESS=C LC_TELEPHONE=C [11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] abind_1.4-0 RGtk2_2.20.14 BiocInstaller_1.2.1 loaded via a namespace (and not attached): [1] tools_2.14.0 -- Sent via the guest posting facility at bioconductor.org.