sudo apt-get install libmagickwand-dev imagemagick

sudo apt-get install libmagickwand-dev imagemagick

Building native extensions.  This could take a while...

ERROR:  Error installing rmagick:

ERROR: Failed to build gem native extension.

    /home/ubuntu/.rvm/rubies/ruby-2.2.1/bin/ruby -r ./siteconf20151106-26672-3q6a8w.rb extconf.rb

checking for gcc... yes

checking for Magick-config... no

checking for pkg-config... 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

checking for outdated ImageMagick version (<= 6.4.9)... *** 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=/home/ubuntu/.rvm/rubies/ruby-2.2.1/bin/$(RUBY_BASE_NAME)

extconf failed, exit code 1

Gem files will remain installed in /home/ubuntu/.rvm/gems/ruby-2.2.1/gems/rmagick-2.15.4 for inspection.

Results logged to /home/ubuntu/.rvm/gems/ruby-2.2.1/extensions/x86_64-linux/2.2.0/rmagick-2.15.4/gem_make.out