How to rotate pdf files and merge using PDFtk in Linux?

How to rotate pdf filesImagine you have clicked pictures of your notebook and saved them as pdf file. You find that it is oriented in the wrong direction and you rotate it using your pdf viewer. But when you are trying to email them to your friend, you will find that it is still misoriented. Are you confused what is happening? Do you want to know how to rotate pdf files permanently? Continue reading “How to rotate pdf files and merge using PDFtk in Linux?”