The Linux network card is turned on

One: File configuration network card when power on, automatically enable

First we use IP addr to view IP information

[Email protected] network-scripts]# IP Addr1: Lo: <LOOPBACK,UP,LOWER_UP> MTU16436qdisc noqueue State UNKNOWN Link/loopbackxx:xx:xx:xx:xx:xxBrdxx:xx:xx:xx:xx:xxinet127.0.0.1/8Scope host lo inet6::1/ -Scope host Valid_lft forever Preferred_lft forever2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU theQdisc Pfifo_fast State up Qlen +Link/etherxx: 0c: in: -: -: F1 BRD ff:ff:ff:ff:ff:ff inet6 fe80::20c:29ff:fe85:58f1/ -scope link Valid_lft forever Preferred_lft forever

You can see that the first one is the local loopback address, and the second is the NIC information we use. Generally no one is not inet and other information. Because the network card is not started by default.

[[Email Protected]hat2 ~]#cd/etc/sysconfig/network-scripts/#网络配置文件位置[[Email protected] network-scripts]# lsifcfg -eth0 (network card can be set)IFDOWN-ISDN ifup-aliases Ifup-plusb init.ipv6-Globalifcfg-lo ifdown-post IFUP-BNEP ifup-Post Net.hotplugifdown Ifdown-PPP Ifup-eth IFUP-PPP network-Functionsifdown-BNEP ifdown-routes ifup-ippp ifup-routes network-functions-Ipv6ifdown-eth ifdown-sit Ifup-ipv6 ifup-Sitifdown-IPPP Ifdown-tunnel ifup-isdn ifup-Tunnelifdown-ipv6 ifup Ifup-plip ifup-Wireless[[email protected] Network-scripts]#

View configuration Files

[Email protected] network-scripts]# vim ifcfg-eth0 DEVICE="eth0"Bootproto="DHCP"HWADDR="00:0c:29:85:58:f1"nm_controlled="Yes"onboot= "No" #默认是启动时不开启网卡, we can set this to YesTYPE="Ethernet"UUID="dd04bdab-73cc-41aa-94a4-1837bff7c726"

Then restart the network

Service Network restart

We found an IP.

[[Email protected] ~]# IP Addr1: Lo: <LOOPBACK,UP,LOWER_UP> MTU16436qdisc noqueue State UNKNOWN Link/loopbackxx:xx:xx:xx:xx:xxBrdxx:xx:xx:xx:xx:xxinet127.0.0.1/8Scope host lo inet6::1/ -Scope host Valid_lft forever Preferred_lft forever2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU theQdisc Pfifo_fast State up Qlen +Link/etherxx: 0c: in: -: -: F1 BRD ff:ff:ff:ff:ff:ff inet192.168.218.129/ -Brd192.168.218.255ScopeGlobaleth0 Inet6 fe80::20c:29ff:fe85:58f1/ -scope link Valid_lft forever preferred_lft forever[[email protected]~]#

The address obtained above is our own set in the Virtual network editor of the virtual machine.

II: Manual command to start and close ifup eth0 and Ifdown eth0

Ifup eth0    is the boot Nic Ifdown  eth0    is to turn off the NIC

Tweet: Ifconfig,ifup,ifdown

The Linux network card is turned on