500 OOPS: vsftpd: refusing to run with writable root inside chroot() Ubuntu 16.04

In Ubuntu 16.04 of VSFTPD 3 you may face this errror when you enable chroot enviroment for ftp user.

Error:
500 OOPS: vsftpd: refusing to run with writable root inside chroot() Ubuntu 16.04


Solutions:

Edit file /etc/vsftpd.conf file and add parameter to enable write permission.

  allow_writeable_chroot=YES

Restart ftp service
sudo service vsftpd restart