A few links. https://askubuntu.com/questions/280312/gui-program-to-resize-pdf-documents-and-change-their-dpi
https://launchpad.net/compress-pdf https://bazaar.launchpad.net/~oriolpont/compress-pdf/mine/view/head:/Compress
A few links. https://askubuntu.com/questions/280312/gui-program-to-resize-pdf-documents-and-change-their-dpi
https://launchpad.net/compress-pdf https://bazaar.launchpad.net/~oriolpont/compress-pdf/mine/view/head:/Compress