Simply change the Service account password that Linux automation uses during the authentication and you could possibly see this issue.
Linux boot does not authenticate. The error states, "No access smb mount: rc.agent warning no express mount found."
No express mount found return code 101 network is unreachable. Mount Error 13 = Permission Denied
Use Step 3 to configure the mapped drives.
Article # 19493 How to store images on a different drive or server (Local Image Store)
Deployment Solution 6.8-6.9