To for Ubuntu 20.04 , you must use manual installation methods or modern alternatives, as it was removed from the official repositories starting with Ubuntu 18.04. While older tutorials suggest a simple sudo apt install cryptkeeper command, this will fail on 20.04. Status of Cryptkeeper on Ubuntu 20.04

: Since Cryptkeeper is just a frontend, you first need the underlying encryption tool: sudo apt update sudo apt install encfs Use code with caution.

You can use GNOME EncFS Manager as an alternative, it lets you import your old encrypted folders. Ask Ubuntu Cryptkeeper equivalent

If you specifically need to access old folders, you can try to install it manually using these steps:

is currently considered obsolete and unmaintained. It relies on EncFS, which has known security vulnerabilities. Because standard support for Ubuntu 20.04 LTS ends in May 2025 , it is highly recommended to use more secure, modern alternatives. How to Install Cryptkeeper (If You Must)