TFTP

# install
yum install xinetd

# edit tftp config file
echo "
service tftp
{
        socket_type             = dgram
        protocol                = udp
        wait                    = yes
        user                    = root
        server                  = /usr/sbin/in.tftpd
        server_args             = -s /tftpboot -v			# changed root dir
        disable                 = no						# enable
        per_source              = 11
        cps                     = 100 2
        flags                   = IPv4
}" > /etc/xinetd.d/tftp

# start server
systemctl enable xinetd
systemctl start xinetd

# directory
cd /tftpboot && mkdir cm mta cvc backup fw
chown -R apache /tftpboot