There are many alternatives to K2PDFOPT for Linux if you are looking for a replacement. The best Linux alternative is ScanTailor Advanced, which is both free and Open Source. If that doesn't work for you, our users have ranked 2 alternatives to K2PDFOPT, but unfortunately only one of them is available for Linux. If you can't find an alternative you can try to remove all filters.
Scan Tailor is an interactive post-processing tool for scanned pages. It performs operations such as page splitting, deskewing, adding/removing borders, and others. You give it raw scans, and you get pages ready to be printed or assembled into a PDF or DJVU file.
