in reply to no responses for the execution of the code

xpdf-2.01/xpdf/pdftotext
This file cannot be run either because it doesn't have the execution bit (chmod +x it then) or the filesystem is mounted with noexec option (remount it with 'exec' option or move the file to another filesystem).

pdftotext
This file (from the last command) is ran from your $PATH, not from your current directory.

Sorry if my advice was wrong.
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