Ubuntu - cannot install RMagick

How to install the RMagick gem to Ubuntu? I found a few threads here on SO, some of there directly pointed out to the installation on Ubuntu systems, but none of them is working for me. Here is the output that I got if I run sudo gem install rmagick ``` Building native extensions. This could take a while... ERROR: Error installing rmagick: ERROR: Failed to build gem native extension. /opt/bitnami/ruby/bin/ruby extconf.rb checking for Ruby version >= 1.8.5... yes checking for gcc... yes checking for Magick-config... yes Warning: Found more than one ImageMagick installation. This could cause problems at runtime. /opt/bitnami/common/bin/Magick-config reports version 6.7.5 Q16 is installed in /opt/bitnami/common /usr/bin/Magick-config reports version 6.6.9 Q16 is installed in /usr Using 6.7.5 Q16 from /opt/bitnami/common. checking for ImageMagick version >= 6.4.9... yes checking for HDRI disabled version of ImageMagick... yes Package MagickCore was not found in the pkg-config search path. Perhaps you should add the directory containing `MagickCore.pc' to the PKG_CONFIG_PATH environment variable No package 'MagickCore' found Package MagickCore was not found in the pkg-config search path. Perhaps you should add the directory containing `MagickCore.pc' to the PKG_CONFIG_PATH environment variable No package 'MagickCore' found Package MagickCore was not found in the pkg-config search path. Perhaps you should add the directory containing `MagickCore.pc' to the PKG_CONFIG_PATH environment variable No package 'MagickCore' found Package MagickCore was not found in the pkg-config search path. Perhaps you should add the directory containing `MagickCore.pc' to the PKG_CONFIG_PATH environment variable No package 'MagickCore' found checking for stdint.h... yes checking for sys/types.h... yes checking for wand/MagickWand.h... no Can't install RMagick 2.13.2. Can't find MagickWand.h. *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/opt/bitnami/ruby/bin/ruby Gem files will remain installed in /opt/bitnami/ruby/lib/ruby/gems/1.9.1/gems/rmagick-2.13.2 for inspection. Results logged to /opt/bitnami/ruby/lib/ruby/gems/1.9.1/gems/rmagick-2.13.2/ext/RMagick/gem_make.out ``` It's on Amazon EC2 servers. If I try to run just gem install rmagick, I get ``` ERROR: While executing gem ... (Gem::FilePermissionError) You don't have write permissions into the /opt/bitnami/ruby/lib/ruby/gems/1.9.1 directory. ``` Could you help me, please, how to fix this issue? Thank you very much EDIT: What I've tried: sudo apt-get install libmagickwand-dev ``` Reading package lists... Done Building dependency tree Reading state information... Done libmagickwand-dev is already the newest version. The following packages were automatically installed and are no longer required: libgraphicsmagick3 libmagick++4 libgraphicsmagick++3 libgraphicsmagick1-dev libgraphics-magick-perl libperl5.14 libgraphicsmagick++1-dev Use 'apt-get autoremove' to remove them. 0 upgraded, 0 newly installed, 0 to remove and 40 not upgraded. ``` sudo apt-get install libmagickwand-dev imagemagick Reading package lists... Done Building dependency tree Reading state information... Done imagemagick is already the newest version. libmagickwand-dev is already the newest version. The following packages were automatically installed and are no longer required: libgraphicsmagick3 libmagick++4 libgraphicsmagick++3 libgraphicsmagick1-dev libgraphics-magick-perl libperl5.14 libgraphicsmagick++1-dev Use 'apt-get autoremove' to remove them. 0 upgraded, 0 newly installed, 0 to remove and 40 not upgraded. apt-get install libmagickwand-dev E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied) E: Unable to lock the administration directory (/var/lib/dpkg/), are you root? sudo apt-get install libmagickwand-dev Reading package lists... Done Building dependency tree Reading state information... Done libmagickwand-dev is already the newest version. The following packages were automatically installed and are no longer required: libgraphicsmagick3 libmagick++4 libgraphicsmagick++3 libgraphicsmagick1-dev libgraphics-magick-perl libperl5.14 libgraphicsmagick++1-dev Use 'apt-get autoremove' to remove them. 0 upgraded, 0 newly installed, 0 to remove and 40 not upgraded. But still the same error message above.