Convert command not found
I was seeing this error from drupal logs:
1 User error: ImageMagick error 127: sh: convert: command not found in _imagemagick_convert_exec() (line 522 of /var/www/example.com/docroot/sites/all/modules/contrib/imagemagick/imagemagick.module).
Which indicates that package ImageMagick wasn't installed. Since the machine in questions was CentOS7, I installed it as follows:
1~$ sudo yum install ImageMagick -y
Ref: