Use dhclient to automatically obtain IP addresses
[[email protected] ~]# dhclient -r[[email protected] ~]# dhclientvi /etc/
[[email protected] ~]# ip add1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:93:47:04 brd ff:ff:ff:ff:ff:ff inet 192.168.1.16/24 brd 192.168.1.255 scope global dynamic ens33 valid_lft 84782sec preferred_lft 84782sec inet6 fe80::bbca:2655:139:aa19/64 scope link noprefixroute valid_lft forever preferred_lft forever
Check whether the network route gateway is correct
[[email protected] ~]# route -nKernel IP routing tableDestination Gateway Genmask Flags Metric Ref Use Iface0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 ens33192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 ens33192.168.1.0 0.0.0.0 255.255.255.0 U 100 0 0 ens33
VI/etc/sysconfig/network-scripts/ifcfg-ens33 type = Ethernet proxy_method = none browser_only = No bootproto = DHCP defroute = Yes route = No route 6init = Yes route 6_autoconf = Yes route 6_defroute = Yes route = no need 6_addr_gen_mode = stable-privacy name = ens33 UUID = 4aa87787-3b5c-4985-9b43-24f247fc71c1 device = ens33 onboot = yes # change the original value to Yes
Restart NETWORK SERVICE
systemclt restart network.service
Network Configuration for centos 7.5 O & M