Persistent Data Across Flashing

The following data is persistent across flashing:

1. SSH host keys uniquely identify the system for all SSH connections.
2. User account metadata files containing details and properties of each user account and group.
   • /etc/passwd: List of the system and local users.
   • /etc/group: List local and system groups and user account membership information.
   • /etc/gshadow and /etc/shadow: Contain user account and hashed-password (using crypt).
   • /etc/subgid and /etc/subuid: The range of group-ids and user-ids allowed for local user account and groups.