https://blog.csdn.net/mrliqifeng/article/details/120185671
https://blog.csdn.net/weixin_44232093/article/details/101372334
yum install -y vsftp
yum install -y ftp
useradd -s /sbin/nologin ftpuser
passwd ftpuser
chown -R ftpuser /data/ftp
systemctl enable vsftpd.service
systemctl start vsftpd.service
出现无法登录的问题530 Login incorrect.
注释那两行,重启后可用
https://my.oschina.net/u/150705/blog/4407023
