Linux SSH - Limit user access to a specific directory

Make sure you are the SuperUser.


Create a user, by typing this command and following the process

adduser username

Specify user base directory to the directory you want

usermod --home /var/www username

If you want a group of users to only access this directory, add the user to a group

addgroup mygroup

usermod -g mygroup username 

Now, specify the directory to be exclusive. Go to "/etc/ssh" and type

nano sshd_config

Find and comment (# at the beginning) this line

Subsystem sftp /usr/lib/openssh/sftp-server

And write this

Subsystem sftp internal-sftp

Match group mygroup

    ChrootDirectory /var/www/

    X11Forwarding no

    AllowTcpForwarding no

    X11Forwarding no  

    ForceCommand internal-sftp

That's all, have fun.