Hi mikels,
please create such a user over your command line:
useradd -u 10XXX -o -d /var/www/vhosts/YOUR_DOMAIN.COM/httpdocs/folder_with_read_only_data -g psacln -s /bin/false ftpread
10XXX = has to be a five-digit number, which doesn't exist yet in your passwd - file at "/etc/passwd"
YOUR_DOMAIN.COM = has to be replaced with your very own domain - name
folder_with_read_only_data = has to be the folder, from where the new FTP - user might read the files and folders.
ftpread = has to be the desired username for your newly created FTP - user.
You will be asked for the password for the new user, after you performed the creation command.
Afterwards, please make sure, that the folder "
folder_with_read_only_data" and the recursive data is owned by "sitedomainadmin" ( admin created within the domain creation procedure )
chown -R feedowner /var/www/vhosts/YOUR_DOMAIN.COM/httpdocs/folder_with_read_only_data
Test the new FTP - user with your preferred FTP - client and try as well to create a file, or to change a file-name.