network configuration

[Nofriyadi Nurdam]

Hi All,
  
  I am a computer class teacher and have to teach how to set up RedHat9.
  But I have problem with network configuration.
  I have tried System Setting > Network.
  Under Network Configuration I find 
  - Defice: status=inactive, alias=eth0
  - Hardware: RealTek RTL-8139, SMC Ez Card
  - DNS: hostname= computer_name
  - Hosts: 127.0.0.1    computer_name localhost.localdomain localhost
  
  As I clicked the profile of device and activitated it, I became  message: You have made changes in your configuration. To activate the  network device eth0, the changes have to be saved
  
  The message after saving: Changes are saved. You may want to restart network and network service or restart the computer.
  
  I have restarted my computer, but the network device stay inactive.
  
  Would you help me please, how to activate the network device.
  In the network there has not been DNS server. (I hope, I could build it next time).
  
  Thanks in advance
  
  Nofri
		
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