问题 I need to read pdf file and I use pdf-text-extract . It works perfectly on my localhost. But when I tried to run the program on server, I got the following error spawn called { '0': 'pdftotext', '1': [ '-layout', '-enc', 'UTF-8', '/tmp/the_file_name.pdf', '-' ], '2': { encoding: 'UTF-8', layout: 'layout', splitPages: true } } events.js:72 throw er; // Unhandled 'error' event Error: spawn ENOENT at errnoException (child_process.js:1011:11) at Process.ChildProcess._handle.onexit (child_process