A recent study using a Linux VM, using the kind with desktop after each restart Linux networking manually, since Linux is operating on XShell, each time re-entering the VM operating Linux networking will be very troublesome, so the thought of one way - to set a static IP
Edit card file
/etc/sysconfig/network-scripts/ifcfg-eth0
Before the card file settings
After the card file settings
Then restart the network card
service network restart
So Linux will automatically restart after the network, and ip is fixed.