1. vsftp.conf 내용 (anonymous 계정 사용 안함) :
anonymous_enable=NO
local_enable=YES
write_enable=YES
local_umask=022
dirmessage_enable=YES
xferlog_enable=YES
connect_from_port_20=YES
chown_uploads=NO
chown_username=root
xferlog_file=/var/log/vsftpd.log
xferlog_std_format=YES
idle_session_timeout=6000
data_connection_timeout=99999
nopriv_user=root
ascii_upload_enable=YES
ascii_download_enable=YES
ftpd_banner=Welcome to Jonseok Lee's FTP service.
#chroot_list_file=/etc/vsftpd/chroot_list
ls_recurse_enable=YES
listen=YES
#listen_ipv6=YES
pam_service_name=vsftpd
userlist_enable=YES
tcp_wrappers=YES
2. /etc/vsftpd/ftpusers 와 /etc/vsftpd/user_list 에서 root 삭제
3. root 계정의 홈디렉토리를 /로 변경
# cp /root/.bashrc /
# cp /root/.bash_profile /
# usermod -d / root