配置流程
1.使用dhcp方式獲取ip,並查看ip地址、網關、DNS信息
2.使用靜態方式配置網卡信息
3.重啓網卡服務，並驗證網絡連接情況
具體操作如下:
第一步，使用dhcp方式獲取ip,並查看ip地址、網關、DNS信息
[root@localhost aaa]# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.181.133 netmask 255.255.255.0 broadcast 192.168.181.255
inet6 fe80::2186:29cf:6689:dfb7 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:88:a5:f2 txqueuelen 1000 (Ethernet)
RX packets 663439 bytes 963233674 (918.6 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 96615 bytes 5997558 (5.7 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1 (Local Loopback)
RX packets 4 bytes 240 (240.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 4 bytes 240 (240.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255
ether 52:54:00:01:29:72 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@localhost aaa]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.181.2 0.0.0.0 UG 100 0 0 ens33
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0
192.168.181.0 0.0.0.0 255.255.255.0 U 100 0 0 ens33
[root@localhost aaa]#
[root@localhost aaa]# nslookup www.baidu.com
Server: 192.168.181.2
Address: 192.168.181.2#53
Non-authoritative answer:
www.baidu.com canonical name = www.a.shifen.com.
Name: www.a.shifen.com
Address: 61.135.169.125
Name: www.a.shifen.com
Address: 61.135.169.121
dhcp方式獲取到ip爲192.168.181.133，網關和DNS都爲192.168.181.2。
第二步，配置網卡信息
[root@localhost aaa]# sed -i 's/dhcp/none/' /etc/sysconfig/network-scripts/ifcfg-ens33
[root@localhost aaa]# echo "IPADDR=192.168.181.133" >> /etc/sysconfig/network-scripts/ifcfg-ens33
[root@localhost aaa]# echo "NETMASK=255.255.255.0" >> /etc/sysconfig/network-scripts/ifcfg-ens33
[root@localhost aaa]# echo "GATEWAY=192.168.181.2" >> /etc/sysconfig/network-scripts/ifcfg-ens33
[root@localhost aaa]# echo "DNS1=192.168.181.2" >> /etc/sysconfig/network-scripts/ifcfg-ens33
[root@localhost aaa]# cat /etc/sysconfig/network-scripts/ifcfg-ens33
TYPE="Ethernet"
PROXY_METHOD="none"
BROWSER_ONLY="no"
BOOTPROTO="none"
DEFROUTE="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_FAILURE_FATAL="no"
IPV6_ADDR_GEN_MODE="stable-privacy"
NAME="ens33"
UUID="fce08860-66e0-45ef-988c-9c7c129aa573"
DEVICE="ens33"
ONBOOT="yes"
IPADDR=192.168.181.133
NETMASK=255.255.255.0
GATEWAY=192.168.181.2
DNS1=192.168.181.2
第三步，重啓網卡服務，並驗證網絡連接情況
[root@localhost aaa]# systemctl restart network
[root@localhost aaa]# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.181.133 netmask 255.255.255.0 broadcast 192.168.181.255
inet6 fe80::2186:29cf:6689:dfb7 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:88:a5:f2 txqueuelen 1000 (Ethernet)
RX packets 663505 bytes 963238329 (918.6 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 96667 bytes 6003559 (5.7 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1 (Local Loopback)
RX packets 4 bytes 240 (240.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 4 bytes 240 (240.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255
ether 52:54:00:01:29:72 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@localhost aaa]# ping -c1 www.baidu.com
PING www.a.shifen.com (61.135.169.125) 56(84) bytes of data.
64 bytes from 61.135.169.125 (61.135.169.125): icmp_seq=1 ttl=128 time=3.67 ms
--- www.a.shifen.com ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 3.679/3.679/3.679/0.000 ms
[root@localhost aaa]#