Lock screen on Linux-based screens [closed]

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Is there a lock screen on Linux-based systems?

When the screen is locked, the user should enter a PIN code to enter back. Like the PIN screen lock on an iPhone.

Answer 1

I don't know if you are looking for a tool or library to do this. There are quite a few DE independent options:

1. xlock
2. slock

They are opensource so you can take a look at code if you are looking for a programatic way to do this.

For library you can look at xlib for all interaction with X. XLockDisplay is the function that you might want to use.

Answer 2

Gnome Desktop:

gnome-screensaver-command -l

What this actually does (source code) is call a DBUS Api that aims to be desktop-neutral. Read more about that on this page

Answer 3

Often you have that choice in the screen saver. Then the computer will be locked after a specific time that you decide. You have it in Ubuntus screen saver.