One, install the virtual machine
Two, CentOS7 Linux create virtual machine process
1. Create a virtual machine and select a custom mode
2. Choose your own image file or install the system later [image file download by yourself]
3. Location and name customization
4. The number of processors and the number of cores depends on the computer situation
5. My computer has 16 threads and 16g RAM
6. What I allocate is one core 4 cores 2g memory
7. The virtual network must be selected at the beginning of the network, that is, the network address translation can be changed to bridge mode later
8. In the beginning, I used the bridge mode directly. Some virtual machines could not connect to the network.
9. According to my own situation, I used a physical disk and a disk installed Linux
10. Under normal circumstances, the default is enough
The settings behind 11 can always be default
12. Be sure not to check the creation and then opening the virtual machine may fail to boot
13 Click to turn on the virtual machine
14. After the mouse click, the screen mouse disappears
15. Just press Enter by default
16. The choice of language is actually similar to English and Chinese
17. Choose Chinese at the bottom according to personal preference
18 Click on Chinese and just default it directly. If you don’t like the current language, you can change it in the keyboard options.
19. Be sure to verify whether your mirror file is ok.
20. After verification, click Finish and then click Finish in the upper left corner
22 .The installation location only needs to click once and then click Finish in the upper left corner, it will automatically allocate the hard disk
23. Linux's hard disk is different from windows, it only has three areas
24. Then click Software Selection
25. Select all the hooks on the left side of the minimum installation, and the required plug-ins will be installed separately
26. Then click KDUMP
27 Turn off kdump kdump is about system abnormalities and uploading to the server to upper-level developers will take up a lot of resources
28. The default is not to open the network connection, so you need to open the network connection
29. Turn on the Ethernet option and there is no special requirement. The default host name is
fine. 30. Here is an ip address for the later remote link
31. Then click on the bottom right corner to start installation
32. It will let you set the root user password and the ordinary user account password. Ordinary users can set it without setting it or set it to see the individual.
Wait for the installation to complete. After the installation is complete, there is a restart in the lower right corner and wait for the restart to complete.
Three, CentOS7 necessary plug-ins and command installation
Centos 7 check the IP address does not exist?
1. It is found that the access ip address does not exist
2. Check whether the machine is assigned a gateway ip add
3. Enter the network card configuration file and
execute the command cd /etc/sysconfig/network-scripts/
4. Modify the file ifcfg-ens33 The command is vi ifcfg- ens33, press shift +i to enter the editing mode, change ONBOOT=no to yes, press shift +: to exit the editing mode, enter wq to save and exit. Then execute the command service network restart to restart the network card service. After the execution is complete, we execute the command ip addr again to check whether the IP address is assigned and then we execute the command yum provides ifconfig to see which package provides the ifconfig command, and then we can see that the net-tools package provides the ifconfig package and then we execute the command to install net- tools package, execute the command: yum install net-tools. After the installation is complete, enter ifipconfig to see
Turn off the firewall: service iptables stop
Turn off the self-starting firewall: chkconfig iptables off
ifconfig activate
yum ifconfig
man yum
q
su root
yum remove ifconfig
yum search ifconfig
yum install net-tools.x86_64
y
y
ifconfig