[QUOTE=till;283093You can do this with sftp (ssh) but not ftp and then use a client like winscp to access the server.[/QUOTE]
I would like to do use SFTP for root, but it's not working. I've set it up exactly (as per OP) how I did the other SFTP users and they all work. It's just the root account that's not working for me
I don't understand why. /root/.ssh is the right place for the authorized_keys file, and the other settings are the same as the other users.
My VPS system:
(Ubuntu 14.04 LTS, Kernel 3.15.4-x86_64, Apache 2.4.7, MySQL 5.5.38, PHP 5.5.9, ISPConfig 188.8.131.52p1, Webmin, PureFTP & Quota, phpMyAdmin, postfix, dovecot, clamav, spamassassin, awstats, fail2ban, Jailkit, bind9, vlogger, webalizer)