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Reminds me of facebook's https://osquery.io/ does this offer anything different?

Crab is aimed specifically at the filesystem, rather than querying devices or processes.

For example wildcard matching on paths, combined with the exec function to run OS commands on the files you get back.

osquery also has some level of setup overhead and requires a daemon running in the background. I don't think this is true of crab.

You don't need to run the daemon. It's also possible to just use it interactively via osqueryi.

Thanks for clarifying. I haven't actually used osquery myself so I wasn't aware.