Internet not working on Ubuntu VM installed on Ubuntu 18.04

zulfi100

Hi,
I am getting internet problem on Ubuntu virtual machine. I tried to execute the ifconfig command, but I got the following error:"ifconfig not installed"

I installed Ubuntu virtual machines on Ubuntu 18.04 OS. Initially the internet was running. But now I can't access the internet. My ifconfig command is not working. I have attached the information about the NETWORK of the machine.
Somebody please guide. Yesterday I installed Kali but I got the same internet problem. I thought I won't get this problem on Ubuntu but I am getting this problem on Ubuntu also. I have installed the Ubuntu from OSboxes. File name is U19_10_VB-64bit.
Somebody please guide me.
Zulfi.