How to take snapshot of PDF file in linux?

How I can take snapsh开发者_C百科ot of first page of PDF file in Linux? I wanna do this on VPS server automaticaly. My distribution is Debian.

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ImageMagick can convert PDF pages if you have Ghostscript installed.

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You can do this with PDFTK. It's available in the Ubuntu repos, so check there first. The syntax you'll want to grab the first page is:

$  pdftk input.pdf cat 1 output out.pdf

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Press & Hold SHIFT + Print_screen KEYS and with mouse select the rectangle of pdf page you want to take screenshot ...