I solved my problem by this way:
Create a new group
sudo addgroup exchangefiles
Create the chroot directory
sudo mkdir /var/www/GroupFolder/
sudo chmod g+rx /var/www/GroupFolder/
Create the group-writable directory
sudo mkdir -p /var/www/GroupFolder/files/
sudo chmod g+rwx /var/www/GroupFolder/files/
Give them both to the new group
sudo chgrp -R exchangefiles /var/www/GroupFolder/
after that i went to /etc/ssh/sshd_config and i added in the end of the file
Match Group exchangefiles
# Force the connection to use SFTP and chroot to the required directory.
ForceCommand internal-sftp
ChrootDirectory /var/www/GroupFolder/
# Disable tunneling, authentication agent, TCP and X11 forwarding.
PermitTunnel no
AllowAgentForwarding no
AllowTcpForwarding no
X11Forwarding no
Now I'm going to add new user with obama name to my group
sudo adduser --ingroup exchangefiles obama
now every thing is completly finish we need one commend to restart the ssh again
sudo service ssh restart
notice: the user now can't do any thing out file directory I mean all his file must be in file Folder
აქ ვნახე ეგ solution
http://unix.stackexchange.com/questions/20...-out-his-folder
directory restrict, ...
