Solve the error of vsftp refusing to run with writable root inside chroot in Ubuntu 14.

Upgrade Ubuntu 9.04 to Ubuntu 14.04 LTS. After vsftpd is restored, you cannot log on. The FlashFXP log prompts:
[18:33:18] Winsock 2.2 -- OpenSSL 1.0.1h 5 Jun 2014
[18:33:24] [R] connecting to 10.10.10.111-> IP = 10.10.10.111 PORT = 21
[18:33:24] [R] connected to 10.10.10.111
[18:33:24] [R] 220 Welcome to Yimiju FTP service.
[18:33:24] [R] USER ******
[18:33:24] [R] 331 Please specify the password.
[18:33:24] [R] PASS (hidden)
[18:33:24] [R] 500 OOPS: vsftpd: refusing to run with writable root inside chroot ()
[18:33:24] [R] connection failed
[18:33:24] [R] trying to reconnect # delay of 1 second after 10 times
Vsftp version 3.0.2
Root @ yimiju :~ # Vsftpd-v
Vsftpd: version 3.0.2

Solution:

Add a line at the end of the vsftp configuration file (/etc/vsftpd. conf:
Allow_writeable_chroot = YES

If you do not want to use vi or vim for editing, run the following command:

# Echo "allow_writeable_chroot = YES">/etc/vsftpd. conf

Restart the vsftpd service:

# Service vsftpd restart