Fixing Ubuntu with No Network
The Linux Tutorial Shows in East Steps How Troubleshooting an Ubuntu 16.04 Xenial Xerus LTS 32/64-bit System with No Network Working.
There are several ways to reactivate the Network of Ubuntu , here we consider the most Easily Running.
How to Download & Burn Ubuntu Live OSPreparing Ubuntu Live Media Guide
Boot the Computer with Ubuntu Live
Find the Target /dev/sdXN Drive
Look into the List of the Mounted devices with:
If You can Not to Find it then Try visually with GParted:
Eventually Unmount it
sudo umount /dev/sdXN
How to Chrooting into Ubuntu with NetworkChroot Ubuntu with No Netwoking
Try a First System Repair with
How to Fix Disk Errors Even if Ubuntu Non BootableRestoring Ubuntu Disk Guide