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@lamngockhuong
Created July 16, 2019 00:56
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How to change the ubuntu login screen
$ sudo gedit /usr/share/gnome-shell/theme/ubuntu.css

Find "#lockDialogGroup" keyword:

alt text

Replace with:

#lockDialogGroup {
  background: #2c001e url(file:///[fileLocation/filename.png]);
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
}

Save and restart the system

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