I just reinstalled Ubuntu using Resetter. But when my desktop rebooted, there was no GUI. I used the command: sudo apt-get install ubuntu-desktop Some packages were installed, but then it shows two errors: hash sum mismatch and unable to fetch some archives, run apt-get update or try with --fix-missing. I'm new to Ubuntu. How can I get a gnome on my desktop?
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Update, fix packages dependencies, upgrade:
sudo apt clean && sudo apt update && sudo apt install -f && sudo apt upgrade
You could also try to install gdm3
or lightdm
display managers and switch to them:
sudo dpkg-reconfigure gdm3
or
sudo dpkg-reconfigure lightdm
Then you could also try to start or restart them by:
sudo systemctl start gdm3
Display manager is responsible for gnome session launching in your case.

Gryu
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Thank you so much this worked!but the password I had set says failed to start session – Ravi Yadav May 10 '20 at 06:13