Decrypting passwords/tokens pushed by Unravel to Databricks DBFS

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If you want to decrypt passwords/tokens pushed by Unravel onto DBFS, run the following steps:

From the installation directory of Unravel, go to unravel/conf/data. Use an editor, for example: vi editor, and open the unravel.yaml file.
From the unravel.yaml file, find the databricks section and copy the aes_key.
```
hosts:
  host_main:
    config:
      databricks:
        aes_key: <dbx_aes_key>
```
You can also fetch this encrypted key from the corresponding Databricks cluster as follows:
1. Access DBFS using a web terminal of the required cluster.
2. Run the following and copy the displayed aes key.
```
cd /dbfs/databricks/unravel/unravel-db-sensor-archive/etc
cat aes_key
```
From the install directory, run the following command along with the encrypted <aes_key> that you had copied.
```
<Unravel installation directory>/unravel/manager support password decrypt --key <aes_key>
```
You are prompted to enter the encrypted passwords/tokens you want to decrypt. This encrypted information is stored in the /dbfs/databricks/unravel/unravel-db-sensor-archive/etc/unravel_db.properties file on Databricks.
Open the /dbfs/databricks/unravel/unravel-db-sensor-archive/etc/unravel_db.properties file and copy the encrypted password/token you want to decrypt.
Paste the encrypted password/token at the prompt and press ENTER. The decrypted password/token is displayed.

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