Linux Centos 7 Network configuration

System version

[Email protected]/]# cat/proc/version Linux version 3.10.0-514.el7.x86_64 ([email protected]) (gcc version 4.8.5 20150623 (Red Hat 4.8.5- (GCC) ) #1 SMP Tue Nov 16:42:41 UTC 2016 [Email protected]/]#

　　

The newly installed CentOS system, which does not have an IP address by default, needs to be configured with an IP address to provide external access, as shown in

There is no valid connection IP at this time, you need to manually configure the network of the system;

CD to/etc/sysconfig/network-scripts directory configuration network card, from can see, the main network card is ens33; that is, you need to configure the name of the ENS33, where you can search for keyword lookup

[[email protected] network-scripts]# ls *ens33-l -rw-r--r--. 1 root root 248 March 19:10 ifcfg-ens33 [Email protected] network-scripts]# VI IFCFG-ENS33 Type=ethernet Bootproto=dhcp Defroute=yes Peerdns=yes Peerroutes=yes Ipv4_failure_fatal=no Ipv6init=yes Ipv6_autoconf=yes Ipv6_defroute=yes Ipv6_peerdns=yes Ipv6_peerroutes=yes Ipv6_failure_fatal=yes Ipv6_addr_gen_mode=stable-privacy Name=ens33 Uuid=a9673c54-e4be-4910-9c97-1eb850426bab Device=ens33 Onboot=no

If you need to configure an IP address, the following parameter items are required, if not added

IPAddr	IP Address
Bootproto	Network mode, DHCP refers to dynamic acquisition, if the need to configure static IP needs to be set to none
PREFIX	Mask
GATEWAY	Gateway Address
DNS1	DNS Address
NAME	Nic Name
DEVICE	NIC driver name, which is the name displayed by the ifconfig command

Find the IP address of the local machine, configure the same network segment as the local machine, which is configured as

ipaddr=192.168.61.132	IP address is legal
Prefix=16	Mask
gateway=255.255.255.0	Gateway
dns1=8.8.8.8	DNS is consistent with local
Onboot=yes	Sets whether the current network card is activated when the system starts network and only the active NIC can connect
Ipv6init=no	Turn off IPV6 configuration initialization, and the rest of the IPv6 settings can be removed
Other configuration items remain unchanged

Save the configuration to exit and restart the network service:

[Email protected] network-scripts]# service network restart Restarting network (via SYSTEMCTL): [OK] [Email protected] network-scripts]# ifconfig ens33: flags=4163<up,broadcast,running,multicast> MTU 1500 inet 192.168.61.132 netmask 255.255.0.0 broadcast 192.168.255.255 Ether 00:0c:29:fc:ff:20 Txqueuelen (Ethernet) RX packets 2036 Bytes 234772 (229.2 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX Packets 1461 Bytes 298360 (291.3 KiB) 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 ScopeID 0x10 Loop Txqueuelen 1 (Local Loopback) RX Packets 892 bytes 80168 (78.2 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX Packets 892 bytes 80168 (78.2 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 [Email protected] network-scripts]#

You can see the result of the Ifconfig command has changed, at this time use SECUCRT connection this address, Ok, can connect normally

Connection Successful! Description The network for the virtual machine CENTOS7 system has been configured successfully

Linux Centos 7 Network configuration