CentOS7 issues and resolutions
update openssl http://www.voidcn.com/article/p-afycxhtw-bpb.html install vsftpd https://www.liquidweb.com/kb/how-to-install-and-configure-vsftpd-on-centos-7/ fix vsftpd Fixing 500 OOPS: vsftpd: refusing to run with writable root inside chroot ()