How to convert PDF to Image? Linux

1. Install imagemagick
2. Using a terminal where the pdf located: convert file.pdf file.png (.png or .jpg or any other format). will create file-1.png ... file-i.png ... file-n.png where n the number of pages.

or using the poppler-utils packages containing the utility pdftoppm capable of converting pages from a pdf file to ppm, png or jpeg format:

pdftoppm -png file.pdf prefix

will produce prefix-01.png etc. for each page.