# Enable encrypt and stable\_inodes feature flag for ext4 file system

Source: [https://docs.qualcomm.com/doc/80-88500-2/topic/57_Enable_encrypt_and_stable_inodes_feature_flag_for_ext4_file_system.html](https://docs.qualcomm.com/doc/80-88500-2/topic/57_Enable_encrypt_and_stable_inodes_feature_flag_for_ext4_file_system.html)

For ext4, enable the `encrypt` and `stable_inodes` feature flags for the file system on which encryption is to be used. To enable the feature flag, perform the following steps:
      
1. Ensure that the file system uses page-sized blocks:

        tune2fs -l /dev/device | grep 'Block size'Copy to clipboard

        Block size: 4096Copy to clipboard

        getconf PAGE_SIZECopy to clipboard

        4096Copy to clipboard

Note: Do not proceed further if the values differ because the file system does not support the encryption.
2. Run the following command to enable the encrypt and stable\_inodes feature on the file system:

        tune2fs -O encrypt,stable_inodes /dev/deviceCopy to clipboard

**Parent Topic:** [File-based encryption (Linux Ubuntu)](https://docs.qualcomm.com/doc/80-88500-2/topic/56_File_based_encryption.html)

Last Published: Aug 18, 2023

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