Calibre convert

I can convert without any problems Kindle azw3 files on the command line with Calibre 6.X desktop.Calibre 6.X desktop runs on another computer then my calibre content server.I would like to convert these files on the content server without installing the Calibre desktop software.I have tried to install the DeDRM tools on the content server with following command: calibre-customize --add DeDRM_plugin.zipThere was no error but the .config/calibre/plugins/ was empty. I have copied the files over from my desktop to the content server but still errors when converting.1% Converting input to HTML...InputFormatPlugin: MOBI Input runningon /mnt/multimedia/text.azw3Found KF8 MOBI of type 'standalone'Traceback (most recent call last): File "runpy.py", line 196, in _run_module_as_main File "runpy.py", line 86, in _run_code File "site.py", line 45, in File "site.py", line 41, in main File "calibre/ebooks/conversion/cli.py", line 419, in main File "calibre/ebooks/conversion/plumber.py", line 1108, in run File "calibre/customize/conversion.py", line 242, in __call__ File "calibre/ebooks/conversion/plugins/mobi_input.py", line 44, in convert File "calibre/ebooks/mobi/reader/mobi8.py", line 85, in __call__ File "calibre/ebooks/mobi/reader/mobi6.py", line 162, in check_for_drmcalibre.ebooks.DRMError:So is this possible to convert without installing the desktop version ?

Hi,I'm confused and have looked all over the Calibre site as well on Mobileread. There's a ticket at where kovidgoyal says that Calibre already supports conversion of .azw1/.tpz - just drag and drop - and he closes the ticket with that comment. Later there's another comment from him that says this problem is fixed in the next trunk release, whatever and wherever that is.I appreciate all the hard work put into Calibre but my problem at the moment is just to convert this book into something I can read on multiple platforms. How can I do that and does Calibre in fact have this function? If so, can someone tell me what to do differently than importing the book into Calibre and either right-click/convert or select/convert e-books? I get a message "Cannot convert 1 of 1 books because no suitable source format was found.".Thanks for any help you can offer!Rob Cohen

Calibre is an e-book library manager. It can view, convert and catalog e-books in most of the major e-book formats. It can also talk to many e-book reader devices. It can go out to the Internet and fetch metadata for your books. It can download newspapers and convert them into e-books for convenient reading. It is cross platform, running on Linux, Windows and macOS.You’ve just started calibre. What do you do now? Before calibre can do anything with your e-books, it first has to know about them. Drag and drop a few e-book files into calibre, or click the “Add books” button and browse for the e-books you want to work with. Once you’ve added the books, they will show up in the main view looking something like this:Once you’ve admired the list of books you just added to your heart’s content, you’ll probably want to read one. In order to do that you’ll have to convert the book to a format your reader understands. When first running calibre, the Welcome wizard starts and will set up calibre for your reader device. Conversion is a breeze. Just select the book you want to convert then click the “Convert books” button. Ignore all the options for now and click “OK”. The little icon in the bottom right corner will start spinning. Once it’s finished spinning, your converted book is ready. Click the “View” button to read the book.If you want to read the book on your reader, connect the reader to