1 week 2nd lesson Linux Configuring IP network Troubleshooting CENTOS7

First, Course notes:

1. Command changes:

View Network

IP Add (7.x)

Ifconfig (6.x)

Yum install-y net-tools using the ifconfig command after 7

Restart Service

Systemctl Restart Network.service (7.x)

Service Network restart (6.x)

2. NIC configuration file changes

/etc/sysconfig/network-scripts/ifcfg-enxx/ethxx

Ifcfg-enxx (7.x)

Ifcfg-ethxx (6.x)

Second, the experiment

Configure IP

Enter your account password in the system console

2. View current NIC Information

   [[email protected]] #ip add

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4. Attempt to obtain the IP address

   [[email protected] "#dhclient  

   run again view NIC command

   [[email protected]] #ip add 

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   Note the IP information of the 2:ENS33 network card, and if you cannot obtain an IP address, see  vmware workstion The network editor of the software, verify that the network that the NIC is connected to has DHCP enabled (the experiment environment is turned on by default), or write down the corresponding network parameters directly.

6. Edit Network card profile

   move the cursor to where it needs to be modified, press key, and the lower-left corner of the screen shows "INSERT" identifies the edit state

   Found the following two parameters and modified

   bootproto=static
   

   Onboot=yes

8. Move the cursor to the last line to add the following parameters,

   ipaddr=172.16.107.158 (IP address acquired by the machine)

   netmask=255.255.255.0 (Subnet mask)

   gateway=172.16.107.2 (Gateway)

   dns1=61.139.2.69 (Domain name resolution server, each province is different, please own Baidu)

   
   

10. Save exit

    Method: Press "ESC" key, enter ": Wq", then press "enter", at this time return to the prompt interface, the cursor flashes

12. Restart Network Service

    [email protected]]#systemctl Restart Network.service

14. Test network

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    After you enter ping www.adminglinux.com, you can resolve to an IP address with a return value indicating that the network configuration is correct

    Also have encountered can resolve to the IP address, but the return value is: timeout, it is possible that the site Ping, it is recommended to test several sites

16. During the test, if you encounter

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    Please check that the DNS configuration is correct

18. Connect:network is unreachable

    Please verify that the gateway is configured correctly, as follows

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10. If you are sure the configuration is correct and you are still unable to connect to the Internet, it is recommended that you remove the network card, add another one, or go to the network editor in VMware workstion to remove and rebuild the appropriate networks.

At this point, the IP configuration of the CENTOS7 virtual machine is over. See you next time!

This article is from the "Everything Must and Spring, JAS" blog, please be sure to keep this source http://badswolf.blog.51cto.com/6725328/1973585

1 week 2nd lesson Linux Configuring IP network Troubleshooting CENTOS7