hostnamectl set-hostname <name>
hostname
vim /etc/sysconfig/network-scripts/ifcfg-ens33
BOOTPROTO="static"
#BOOTPROTO="dhcp"
IPADDR=192.168.10.121
NETMASK=255.255.255.0
GATEWAY=192.168.10.2
DNS1=192.168.10.2
systemctl restart network
ifconfig
ping www.baidu.com