TL;DR
DSM 6.0 significantly alters SSH access by requiring users to log in with an administrative account rather than using the 'root' user.
- To gain administrative privileges, users must log in as an authorized account and utilize sudo, eliminating the need to use the 'root' username.
- Admin access requires explicitly verifying that your user account is added to the administrators user group via the DSM Control Panel.
- The base DSM installation has replaced the standard 'zip' utility; therefore, manual unzipping of packages must now use 7z.