cat /etc/vsftpd/vsftpd.conf
listen=YES
anonymous_enable=NO
local_enable=YES
local_umask=022
write_enable=YES
connect_from_port_20=YES
chroot_local_user=YES
check_shell=NO
xferlog_enable=YES


===============================================================
cat /etc/pam.d/vsftpd
#%PAM-1.0
auth       required     pam_listfile.so item=user sense=deny file=/etc/vsftpd/ftpusers onerr=succeed
auth       required     pam_stack.so service=system-auth
#auth       required    pam_shells.so
account    required     pam_stack.so service=system-auth
session    required     pam_stack.so service=system-auth