Unable to login as root via terminal/ssh? It looks like Synology changed something in DSM version 6.0. The suggested way to make changes to system files now is login to terminal/ssh as an administrator, then elevate your user account privileges, as shown in the below steps:

1. Enable SSH/Terminal in the DSM settings via Control Panel > Terminal and SNMP
2. Open up a command prompt in Windows, press Windows key + ‘R’ , type CMD, press enter
3. Open up a SSH connection to your Synology NAS using administrator account

ssh admin@<ip_addresses_of_your_NAS>

3. Elevate your account privileges with the following command:

sudo -i

That’s it, now you should be able to edit system files and perform commands as root.