Hello i’m new and i don’t have much knowledge in Linux still now.
Is it possible to create new user with permission for some Folder? Because i want add a Folder in nextcloud and don’t want to use the admin user for mount the Folder in nextcloud.
Jep take care to differentiate between software internal user management and UNIX users. Nextcloud has its own internal user management, hence users can be created, given or revoked admin privileges etc from within Nextcloud web UI. UNIX users are to login from console on boot or SSH client and those have nothing to do with Nextcloud users.
It makes sense to take care both, change passwords at least .