The large size of a PDF file won’t permit to send it by email because of the probable limitation on the maximum size of attachments. In Linux you can compress a PDF file from the command line without losing its quality, with the help of ps2pdf tool, that is a part of ghostscript suite . From this article you will learn how to compress a PDF file and significantly reduce its size from the Linux command line. First of all it is required to install the ghostscript suite that provides the ps2pdf utility . To get this open the linux terminal and execute the following command. sudo apt-get install ghostscript Compress PDF File In Linux Run the following command to compress and reduce the size of the BIG.pdf file and save the result to the SMALL.pdf file: ps2pdf BIG.pdf Small.pdf Results are pretty amazing: