I am trying to use ecryptfs under Google Cloud Shell. Google Cloud Shell is a virtual machine running Debian GNU/Linux 9. I installed ecryptfs-utils package using command:

sudo apt install ecryptfs-utils

After that, I created two new directories:

mkdir ~/dir ~/dir.sec

And I am trying to mount dir.sec on dir using:

sudo mount -i -t ecryptfs ~/dir.sec ~/dir \
  -o ecryptfs_cipher=aes,ecryptfs_key_bytes=32,ecryptfs_passthrough=no,\

I am getting the following error:

mount: unknown filesystem type 'ecryptfs'


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