Reduce client setup verbosity and resolve cat: write error: Broken pipe

[a-t-0]

Getting the root CA from the server into the client is still a verbose process.

• [ ] Resolve the error message: cat: write error: Broken pipe.
• [ ] remove the need to say "yes" to the question "Do you want to add your fingerprint"?
• [ ] Silence all other output of these procedures.
• [ ] Create a green message or red message that tells the user whether or not the target file has been retrieved from the server into the client successfully or not.