Installing ImageMagick & Ghostscript on Ubuntu

howto.md

1. You have Ghostscript installed, right? Otherwise sudo apt-get install ghostscript
2. This is important and installs the headers (iapi.h etc) which are required but don't come with the default Ghostscript package: sudo apt-get install libgs-dev
3. I also needed sudo apt-get install gs-esp
4. For me the pre compiled version of ImageMagick never accepted Ghostscript, so let's remove it: sudo apt-get --purge remove imagemagick
5. Get the source of ImageMagick, untar it, cd ImageMagick-xx
6. ./configure --with-gslib=yes [and what else you need]
7. Confirm in the output near the bottom gslib yes yes and not gslib yes no
8. make
9. make install
10. Run convert -list configure | grep DELEGATES => DELEGATES bzlib djvu freetype gs jpeg jng jp2 lcms png tiff x11 xml zlib
11. See the gs in there? You got it!

Thanks! Simply adding "ghostscript" to our Dockerfile apt-get lines solved an issue with Rmagick, ImageMagick, and "Font not found".

Updated gist https://gist.github.com/ahmadhasankhan/3d172098a8890f3a9851ced1690d4df6