Having troubles setting up FTP details

Check that your username and password are correct when logging into the terminal. Edit: Also it could be that the user for some reason doesn’t have premission to that directory.

yes i think the latter is the reason, but how do we give them permission to that directory?

Ok I wasn’t sure if it was access denied which means wrong username/password. You change the permissions to the directory(s) and files by using the command chown to the change the owner of the directory and files.

But how do i access the directorys and files to do this change?

You have to use the sudo command in the terminal. Example sudo admin-user chown FTP-user directory name

The sudo user is the one that has root access. The ftp user is the user that you want to setup as the directory owner.