CheckIfFileExists returns true if the specified fileName exists.

CreateConfigFile creates the file with proper owner permission.

CreateDirectoryIfNotExists makes a directory if not exists yet.

GenerateACLConfig writes the redis ACL file based on the pre-defined templates.

GeneratePasswordFile creates a random password and writes it to the Postgres password file.

GeneratePostgresScript writes the initialize Postgres db script files based on pre-defined template to create the edgex_db and multiple users/password for different EdgeX services.

GeneratePseudoRandomString will return a randomized string of characters at the length specified via input variable `n`.

GenerateRedisConfig writes the startup configuration of Redis server based on pre-defined template.

MarkComplete creates a doneFile file.