Step 1: Install WINE – https://www.winehq.org/
Step 2: Download FTM-400 software – https://www.yaesu.com/downloadFile.cfm?FileID=14972&FileCatID=267&FileName=FTM%2D400D%5FADMS%2D7%28DG%2DID%29%5FEXP%5FV1100.zip&FileContentType=application%2Fx%2Dzip%2Dcompressed
Step 3: Extract all the files.
Step 4: Run .Net framework via Wine (Right click “Open with Wine Installer”) and run thru the .net framework
Step 5: Launch ADMS software in the other folder. Ftm400dAdms7.exe (Right click “Open with Wine Installer”)
All set! I have only used the SD card feature have not tested the COM ports in wine.