Error message "500 OOPS: vsftpd: refusing to run with writable root inside chroot()" - keep user jailed

For VSFTPD 3,

1. Go to: /etc/vsftpd.conf

2. and add this:

   allow_writeable_chroot=YES
   

   Just add it if it does not exist yet.

3. Restart the vsftpd service:

   service vsftpd restart
   

And it should work.

The real solution of this problem: the home folder of the user should not be writable only readable.

So, if user site is in the folder is cat/example.com/http/, folder cat must have chmod 555 and all will be OK.

After further review of this post, in the comments a package was posted that fixed my issue. You can search for it by either my name or "Marks" Documentation: http://www.benscobie.com/fixing-500-oops-vsftpd-refusing-to-run-with-writable-root-inside-chroot/. Here are my details of how I fixed this further.

USERS ARE STILL JAILED TO THEIR HOME DIRECTORIES!!!

# ------------------------------------------------------------------------------
# SETUP FTP USERS --------------------------------------------------------------
# ------------------------------------------------------------------------------

# create the ftp users and lock them to the website directories
useradd -d /srv/www/[website/appname] -m [ftp user name]

# set the ftp account passwords
passwd [ftp user name]

# add the ftp users to the www-data user/group
adduser [ftp user name] www-data

# BUG FIX: 500 OOPS: vsftpd: refusing to run with writable root inside chroot()
sudo add-apt-repository ppa:thefrontiergroup/vsftpd
sudo apt-get update
sudo apt-get install vsftpd

# Edit the vsftpd.conf and append this setting to the end of the file to keep users' jailed!
nano /etc/vsftpd.conf

# add all of the text between the starting [[ and ending ]]
# [[

# Keep non-chroot listed users jailed
allow_writeable_chroot=YES

# ]]

# restart the service for changes to take effect
sudo service vsftpd restart

#test ftp via secondary terminal window:
ftp [ftp user name]@[server ipaddress] [ftp port]