# Ubuntu – Gnome Lock Screen Terminology

18.10lock-screen

There are two lock screens, sort of. One where you can login and one which is just a cover for it.

What are the names of these two screens?

• It is somewhat understood from the gdm3.css style sheet that

1. the one that shows when the system is boot up -->> login screen

2. the one that shows when the system is locked automatically or manually and where the 3 swipe up arrows are visible -->> lock screen

3. the one that is visible after swipe up -->> unlock screen

the file /usr/share/gnome-shell/theme/ubuntu.css is the style sheet for 18.04 by default.. and some of it's contents are

    /* TOP BAR */
#panel {
background-color: rgba(0, 0, 0, 0.2);
/* transition from solid to transparent */
transition-duration: 500ms;
font-weight: bold;
height: 1.86em; }
background-color: transparent; }


when the contents are changed like this

    /* our unlock screen isn't fully transparent */
#panel.unlock-screen {
background-color: red;
}