I am new to the Linux platform and need to work on ubuntu but by mistake, I delete some desktop files and installed Lubuntu desktop which is really not much attractive and now I want to go back to the official Ubuntu 20.04 default settings. Is there any way to do this through sudo commands?
Answer:
Thank you so much for everyone. Your answers helped me to manage the Ubuntu workspace. –
But now I have one more question not relevant to the above one but now at the time of login to the user account I can see many workspaces like Ubuntu 2 times and LXQT desktop (for reference I attached an image below with the previous question), now my question is how to remove those or these are pre-installed options for user-dependent choice to use any like in android to use different themes?