Limit SFTP Access to a folder.txt

- Create Group:
$ sudo groupadd *group name*

- Adding New User to the SFTP Group (Read Below for already created user)
$ sudo useradd -g *group name* -s /bin/false -m -d /home/*username* *username*
$ sudo passwd *username* (to set password on new created user)

###The -g *group name* option will add the user to the sftponly group.
###The -s /bin/false option sets the user’s login shell. By setting the login shell to /bin/false the user will not be able to login to the server via SSH.
###The -m -d /home/*username* options tells useradd to create the user home directory.

- Adding Already Created User to the SFTP Group (Read Above for creating new user)
$sudo usermod -G *group name* -s /bin/false /username*

- The user home directory must be owned by root and have 755 permissions
$ sudo chown root: /home/*username*
$ sudo chmod 755 /home/*username*

- Create Directories as Users can't create for themselves
$ sudo mkdir /home/*username*/{public_html,uploads}
$ sudo chmod 755 /home/*username*/{public_html,uploads}
$ sudo chown *username who is in the group*:*groupname* /home/*username*/{public_html,uploads}

-Configuring SSH for Group
$ sudo nano /etc/ssh/sshd_config
(Type this below the line Subsystem sftp internal-sftp)

Match Group *groupname*
  ChrootDirectory %h
  ForceCommand internal-sftp
  AllowTcpForwarding no
  X11Forwarding no

$ sudo systemctl restart ssh

- Login to the sft
$ sftp username@192.168.121.30
username@192.168.121.30's password: $