fsverity is a userspace utility for fs-verity that allows you to set up fs-verity
protected files. fs-verity is a Linux kernel feature that uses a hidden Merkle tree
(hash tree) associated with the file for transparent on-demand integrity/authenticity
verification of the contents of read-only files.
This mechanism is similar to dm-verity, but fs-verity is implemented at the file level
rather than at the block device level.