Dear Scortto,
What I would like do first to add new user and allow new user to both actually ftp and ssh to my server. The protocol being used for ftp is sftp. So I want to control such that if userA login either via ssh or ftp can only see the designated folders only and can not traverse to other location. I read there is something called jailkit is it? Will that control both ftp and ssh? Any good link for me to start as a newbie. Thank you.