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pdf files

How do I determine whether a variable called spath="/srv/www/cyberciti.biz/https" contains a substring called "cyberciti.biz"?
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Q. How do I find out more information about Portable Document Format (PDF) document from a shell prompt? How do I find out information such as what software used to create a pdf file, its page size, and its creation date etc, using the terminal?
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Question: I've downloaded configuration file in a PDF format. I do not have GUI installed on remote Linux / UNIX server. How do I convert a PDF (Portable Document Format) file to a text format using command line so that I can view file over remote ssh session?
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Q. How do I extract images from a PDF file under Linux / UNIX shell account?
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Bash Shell Loop Over Set of Files

How do I run shell loop over set of files stored in a current directory or specified directory?
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I do not remember where I saved pdf and text files under Linux. I have downloaded files from the Internet a few months ago. How do I find my pdf or text files?
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