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This article shares with you the content of a sample analysis of the installation and configuration of the CentOS 7.3.1611 system. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Description:

Up to now, the latest version of CentOS 7.x is CentOS 7.3.1611. The specific installation and configuration process of CentOS 7.3.1611 is described below.

Server-related settings are as follows:

Operating system: CentOS 7.3.1611

IP address: 192.168.21.130

Gateway: 192.168.21.2

DNS:8.8.8.8 8.8.4.4

Note:

The CentOS 7.x series only has 64-bit systems, not 32-bit systems. The production server recommends installing the CentOS-7-x86_64-Minimal-1611.iso version

First, install CentOS 7.3.1611

After successfully booting the system, the following interface appears

Interface description:

Install CentOS 7 # install CentOS 7

Test this media & install CentOS 7 # Test the installation files and install CentOS 7

Troubleshooting # fix the fault

Select the first item here, install CentOS 7, enter, and enter the interface below

Language selection interface, the official production server is recommended to install the English version.

Continue, continue.

Select-system SYSTEM- installation location INSTALLTION DESTINATION, enter the disk partition interface

Select-other storage options Other Storage Options- partition Partitoning- I want to configure partition I will configure partitioning

Click "finish Done" in the upper left corner to enter the following interface

The new mount point uses the following partition scheme: standard Standard Partition

Complete Done

Plan before zoning

Swap # swap partition, generally set to 2 times memory

/ # all remaining space

Note: it is recommended to divide the production server into a separate / data partition to store data

Click the "+" sign in the lower left corner

Mount point: swap

Expected capacity: 2048

Add a mount point, as shown in the following figure

Continue to click the "+" sign in the lower left corner.

Mount point: /

Expected capacity: leave blank # default to all remaining space

Add a mount point, as shown in the following figure

Click "finish Done" in the upper left corner to enter the following interface

Accept the change to Accept Changes and go to the following interface

Software SOFTWARE "-" Software Select SOFTWARE SELECTION ", we use the Minimal version, and the default is minimized installation.

After setting up, click Done

Start installing Begin Installation

Enter the interface below

Select-the user sets the USER SETTINGS-ROOT password and goes to the following interface

Set Root password

If the password length is less than 5 characters, you will be prompted to press "finish" twice to confirm, and the installation will continue.

After the installation is complete, you will enter the following interface

Restart Reboot

Enter the login interface

Enter the account number into root and enter enter.

Then enter the root password set above and enter enter.

System login succeeded

2. Set the IP address and gateway DNS

Description: CentOS 7.x does not automatically open the network connection after it is installed by default!

Cd / etc/sysconfig/network-scripts/ # enter the network profile directory

Vi ifcfg-ens33 # Edit the configuration file to add and modify the following

BOOTPROTO=static # enable static IP address

ONBOOT=yes # enable automatically enable network connection

IPADDR0=192.168.21.130 # set IP address

PREFIXO0=24 # set the subnet mask

GATEWAY0=192.168.21.2 # set Gateway

DNS1=8.8.8.8 # set the main DNS

DNS2=8.8.4.4 # set backup DNS

: wq! # Save exit

Service network restart # restart the network

Ping www.baidu.com # Test whether the network is working

Ip addr # View IP address

3. Set the host name to www

Hostname www # set the hostname to www

Vi / etc/hostname # Edit configuration file

Www # change localhost.localdomain to www

: wq! # Save exit

Vi / etc/hosts # Edit configuration file

127.0.0.1 localhost www # modify localhost.localdomain to www

: wq! # Save exit

4. Change the name of the network card ifcfg-ens33 to ifcfg-eth0

In the CentOS 7.x system, the network card naming rules are redefined, which may be "ifcfg-ens33" and so on. Let's change the network card to ifcfg-eth0.

1 、 cd / etc/sysconfig/network-scripts/

Mv ifcfg-ens33 ifcfg-eth0 # change the name

Vi ifcfg-eth0 # Editing

NAME=eth0 # modification

DEVICE=eth0 # modification

: wq! # Save exit

2. Edit vi / etc/sysconfig/grub #

Add a "net.ifnames=0 biosdevname=0" to the "GRUB_CMDLINE_LINUX" variable

: wq! # Save exit

3. Run the command: grub2-mkconfig-o / boot/grub2/grub.cfg # regenerate the grub configuration and update the kernel parameters

4. Add rules for udev

Create a network card rule "70-persistent-net.rules" in the "/ etc/udev/rules.d" directory and write the following statement:

SUBSYSTEM== "net", ACTION== "add", DRIVERS== "? *", ATTR {address} = = "00:0c:29:1e:a3:77", ATTR {type} = = "1", KERNEL== "eth*", NAME= "eth0"

# ATTR {address} = = "00:0c:29:1e:a3:77" is the MAC address of the Nic

Cd / etc/udev/rules.d

Vi 70-persistent-net.rules # add

SUBSYSTEM== "net", ACTION== "add", DRIVERS== "? *", ATTR {address} = = "00:0c:29:1e:a3:77", ATTR {type} = = "1", KERNEL== "eth*", NAME= "eth0"

: wq! # Save exit

Shutdown-r now # restart the system

The network card has been changed to eth0

Thank you for reading! This is the end of the article on "sample Analysis of CentOS 7.3.1611 system installation and configuration". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it for more people to see!

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