One of the main reasons to convert a pdf file into djvu file is to save space.
on Linux:
If you want to convert djvu to pdf, then you have to install a package from here.
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on Linux:
1 sudo apt-get install pdf2djvu
2 pdf2djvu -o output_file input_file
2 pdf2djvu -o output_file input_file
If you want to convert djvu to pdf, then you have to install a package from here.