After downloading the file, verify its integrity using the SHA-256 checksum:
Here's a simple script to automate these steps:
gpg --verify ImageMagick-7.1.1-15.tar.gz.asc ImageMagick-7.1.1-15.tar.gz
# Verify gpg --keyserver https://keys.gnupg.net --recv-keys 0xB031BD6E gpg --verify ImageMagick-${VERSION}.tar.gz.sig ImageMagick-${VERSION}.tar.gz
tar -xvf ImageMagick-7.1.1-15.tar.gz
./configure