Czkawka has a CLI version as well which is much smaller in size than the graphical user interface version. To get started, type czkawka_cli to get a list of supported commands and examples. Additional information on the CLI versino and general tips and tricks on using the program can be found on the developer's GitHub website.
Never used it, but recently heard of it (intending to use it soon as well, after I consolidate all my files on my NAS as well). If you are using Linux, try out czkawka, a de-duplication program written in Rust. It not only checks names and data (ie file hashes), but also checks out the files themselves, like for example pictures with different encodings.
Thanks, synology runs btrfs, I have a spare machine to spool up a linux version (generally just play with mint or ubuntu do to work- or could run a vm ) but all of the old drives are windows. Some may even go back to 98/95.
Tried apt-get install in cli, not found. Should have checked software repository (manager) first- found and installed czkawka (no suffixes). Has intuitive gui interface, see s/shot:
Unknown what the (hiccup) designation means, but just used the app to find and remove dupes from docs folder- some files had multiple dupes, could be from updating to newer OS or who knows why. Docs folder had 270 dupes! App has a babysitting feature where it warned me that I had (inadvertently) marked all examples of a couple of files for deletion.
From what I can deduce, this app was not originally gui- that was added only recently. Finished yesterday using czkawka to find dupes in all directories- I have added several to those native to the OS. Wound up deleting almost 800 dupes in all. I knew there were quite a few, but still surprised at just how many. They must have been added when transferring files from our old computer into this one, and a few years back when upgrading the OS in that old machine.
Interesting that the app shows the paths of each item back to the root folders. Many of the duplicated pairs were in different folders and a few even had different names- meaning that czkawka compares content, not names, to find dupes. And, some files were in triplicate or quadruplicate.
You can download Czkawka from github.com/qarmin/czkawka/releases. You can find Czkawka binaries for Linux, Windows and macOS. For each, there are separate GUI and command line binaries available for download.
Using this, you won't find Czkawka in your applications menu. So either launch it via Alt + F2 or a by opening a terminal and typing czkawka-gui, or you can add a menu entry for it using a tool such as MenuLibre.
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