I've installed a fresh Wordpress site on my Amazon Linux AMI following the setup instructions listed on the EC2 Tutorials section i.e. Hosting a WordPress Blog with Amazon Linux. I'm also using the WP S3 Offload plugin so that I can use S3 to store my media files, rather then housing them on the EC2 instance. Ok, all that said the WP S3 Offload plugin is showing an error/warning message that says, Image Manipulation Library Missing  Looks like you don't have an image manipulation library installed on this server and configured with PHP. You may run into trouble if you try to edit images. Please setup GD or ImageMagick.I know I could search yum packages by typing sudo yum search ImageMagick in my EC2 instances terminal, which is what I did... and a list of available packages came up. Since I have PHP v5.6 installed, I decided to use the php56-pecl-imagick package via sudo yum install -y php56-pecl-imagick. I assumed that would take care of the problem but the WP S3 Offload plugin is still showing that same warning about the Image Manipulation Library Missing.Did I install/configure the ImageMagick package correctly? Is there another or more optimal way to install the ImageMagick package? How can I test if the package is installed or not?Am I missing any other packages?
How To Install and Configure ImageMagick for PHP and Wordpres on Amazon Linux AMI
ssh;yum;imagemagick;amazon ec2;wordpress
Adding this as an answer as it seems to have helped:You should ensure that ImageMagick itself is installed, i.e. make sure that the actual binaries are present. Check what is returned by convert --version and also provide the output ofrpm -qa|sort|grep -i magick which should confirm that ImageMagick and php56-pecl-imagick are installed.I've tested with a recent CentOS installation, and there php-pecl-imagick already requires ImageMagick, but it seemed to be missing on your installation.