I'm creating a new user with the following details:useradd -d /var/www/html/testuser.com -G users testuserI proceed by creating a new password for the user and attempt to login via SSH, I land on /var/www/html/testuser.com but I can still go back in the directories. I want to restrict user permissions so that they can only manage the content inside the testuser.com and sibblings (so they can do all normal operations), I do not want the user to be able to navigate back in the directories and effectively have root access. 
Restrict user access in linux
users;account restrictions