After installing the database, after starting it, it was found that the system could not be connected to the Internet....ping failed..
examine:
At this time, you need to go to ifconfig to have a look
Note that after ifconfig in my area at this time, I saw it, only the one I drew a red box, the one above lo is not there, this is a problem...
The network card here is ens33 here ifcfg-ens33
Then I looked at the corresponding network configuration and there is no problem.
I found out later
ifup ens33 Execute this on it...
But in fact, I reported an error when I executed it. It said that NetworkManager was not started, so I will talk about it...
This thing was closed when we installed the Hangao database, and the official tutorial made it closed...
Start it again:
Let's see, here we go to start again
systemctl start NetworkManager is fine, at this time
After starting, go to ifup ens33 to start the network card.