cryfs:tldr:4ae0c

The given command is using the "cryfs" tool to unmount a previously mounted encrypted file system. Here's a breakdown of the command:

cryfs: It is the name of the application or command-line tool being used.

--unmount-idle: This is a flag or option provided to the cryfs command. It specifies that the file system will only be unmounted if it is idle, meaning there are no active processes accessing it. The flag ensures a safe unmounting process.

${10}: This is a placeholder for a parameter passed to the command. It refers to the 10th positional parameter, which means it expects a value passed as the 10th argument when the command is executed.

${path-to-cipher_dir}: It is another placeholder for a parameter. It represents the path to the directory where the encrypted file system (cipher directory) is mounted. The actual path should be provided when running the command.

${path-to-mount_point}: Similarly, it is a placeholder for the path where the encrypted file system is mounted as a virtual drive. The path to the desired mount point should be filled in when executing the command.

To use this command, you would replace ${10} with the actual 10th argument value, ${path-to-cipher_dir} with the path to the cipher directory, and ${path-to-mount_point} with the desired mount point path. The command will then unmount the specified cryfs file system if it is idle.