#安装
1. sudo apt-get install libjpeg62 (not sure if this is required or just dev is enough)
2. sudo apt-get install libjpeg62-dev
3. 卸载以前所有和imagemagick相关的包, 如：
sudo aptitude purge imagemagick， 卸载libmagick9等
4. install libperl-dev
sudo aptitude install libperl-dev
5. install rmagick
svn co https://www.imagemagick.org/subversion/ImageMagick/branches/ImageMagick-6.5.6
cd ImageMagick-6.5.6 && ./configure && make & sudo make install
# error while loading shared libraries: libMagickCore.so.4:
解决方法：
-1 Type
-
sudo ldconfig /usr/local/lib
-2 不太好的方法
place source code archive ImageMagick.tar.gz somewhere in Your home directory
error while loading shared libraries
解决方法：
1 运行 /sbin/ldconfig –v 更新
2 运行前执行 export LD_LIBRARY_PATH=/usr/local/lib