Explain the function of static keyword and final keyword in Java in detail>>>

The solution is as follows:
command: service NetworkManager stop
to prevent the service from restarting the next time, the solution is:
chkconfig NetworkManager off

Restart the network card, it will be OK

Then add:

chkconfig network on

Once, according to the above result, an error was reported as follows:

Thinking about whether the connection mode is wrong, turn off the system and have a look. Sure enough, because of the previous test project, I used bridged connection mode instead of NAT connection mode, and then restart the system