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Application Data

Default Leapp directories

Here the user can find all the directories that Leapp uses directly or indirectly.

Installation path

By default, Leapp is installed in the following locations:


Configuration files

By default, Leapp stores the configuration files in the following locations:



  • Leapp-lock.json stores the Leapp configuration and is encrypted.
    • On startup, if Leapp-lock.json is not found, Leapp will create an empty version of it.
  • Leapp-lock.backup.bin stores a backup of Leapp-lock.json and is updated on startup if Leapp-lock.json is considered valid.
    • On startup, if Leapp-lock.json is corrupted, Leapp-lock.backup.bin will be used to restore it.
    • If both files are corrupted, a new empty configuration will be created.
  • .latest contains the latest version number of Leapp. If missing, it will be created again on startup.

Credentials file

By default, Leapp writes the credentials file in the following locations:


Logs file

By default, Leapp writes logs to the following locations:



Logs are structured in the following way:

[YYYY-MM-DD HH:mm:ss.mmm] [LEVEL] [rendered/system] [COMPONENT] MESSAGE {Useful Object / Stacktrace Err Object}


Please always add logs to any issue you want to fill whenever possible, so you can help the team identify the problem quickly