If you’re using the latest version of Ubuntu (14.04 as of the writing of this article), QPDF is most likely installed. The tool allows you to encrypt and decrypt, web-optimize, and split and merge PDF files. QPDF is a command-line program for Linux that converts from one PDF file to another equivalent PDF file while preserving the content of the file. The unprotected PDF file is generated and saved to the location you specified in the command. Replace the path shown here with the full path and filename you want to use for the unprotected PDF file generated by pdftk. Prompt for the path and file name you want to use for the unprotected PDF file generated by pdftk followed by the full path and filename for the unprotected PDF file that will be generated. Output /home/lori/Documents/unsecured.pdf Replace “password” with the password used to open your file. Prompt for entering the user password for the protected PDF file and the password used to open the file. Replace this with the full path and filename for your password-protected PDF file. The breakdown of the command is as follows: pdftkįull path and filename of the password-protected PDF file. Pdftk /home/lori/Documents/secured.pdf input_pw password output /home/lori/Documents/unsecured.pdf

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