Missing ffs_batch CLI tool:
The /opt/FreeFileSync/Bin/ directory only contains GUI binaries (FreeFileSync_x86_64, RealTimeSync_x86_64), despite the installer registering .ffs_batch file extensions.
Attempts to run FreeFileSync_x86_64 in batch mode (-b) fail with Unable to initialize GTK+ (GUI dependency error).
How to validate the .key license on a server without GUI?
Installed via .run file (logged as successful but no CLI tools).
Attempted workarounds with Xvfb (virtual X11) and rsync.
installed FreeFileSync Donation Edition on a headless Linux server but encountered two key issues:
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FFS doesn't have a separate CLI executable
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How can I use FreeFileSync on a Linux server without a graphical interface
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How can I use FreeFileSync on a Linux server without a graphical interface xCSxXenon, 04 Jun 2025, 20:09
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https://freefilesync.org/manual.php?topic=command-line
I use Windows, so I can't confirm if these work on Linux.
I use Windows, so I can't confirm if these work on Linux.