+echo ==========================Remove NetworkManager============================
+systemctl disable NetworkManager
+systemctl enable network
+yum -y remove NetworkManager
+
+cat - > /etc/sysconfig/network-scripts/ifcfg-eth0 <<"_EOF"
+DEVICE=eth0
+BOOTPROTO=dhcp
+ONBOOT=yes
+_EOF
+echo =======================End Remove NetworkManager===========================
+