* =========================Full Config SFTP=== ==== ==== ==== ====
  * Specify Chroot Directory for a Group 
  * 
  * You want to put only certain users (i.e users who belongs to sftpusers group) in the chroot jail environment. Add the following lines at the end of /etc/ssh/sshd_config
  * 
  * Match Group ntvjgroup
  * 	ChrootDirectory %h
  * 	X11Forwarding no
  * 	AllowTcpForwarding no
  * 	ForceCommand internal-sftp
  * 
  * service ssh restart
  *  
  * addgroup --system ntvjgroup
  *  
  * useradd njuser --gid ntvjgroup --groups ntvjgroup -m --shell /bin/false
  *  
  * root@ntv:/home# ls -la
  * drwxr-xr-x  2 njuser ntvjgroup 4096 Jan 24 22:56 njuser
  * 
  * # set password 
  * passwd njuser
  * 
  * vi /etc/passwd
  * njuser:x:1002:117::/var/www/ntvdocs/ntvjobs:/bin/false
  *  
  * Setup Appropriate Permission
  * root@ntv:/var/www# ls -la
  * drwxr-xr-x  3 root 	www-data 4096 Jan 24 23:08 ntvdocs
  * root@ntv:/var/www# cd ntvdocs
  * root@ntv:/var/www/ntvdocs# ls -la
  * drwxr-xr-x  3 root root 	4096 Jan 24 23:08 ntvjobs
  * root@ntv:/var/www/ntvdocs/ntvjobs# ls -la
  * drwxr-xr-x 2 njuser ntvjgroup 4096 Jan 24 23:21 public_html
  * root@ntv:/var/www/ntvdocs/ntvjobs# pwd 
  * /var/www/ntvdocs/ntvjobs
  *