xtrlock
Transparent X display screen locker
TLDR
Lock display
$ xtrlock
Lock with blank screen$ xtrlock -b
Lock and fork to background$ xtrlock -f
SYNOPSIS
xtrlock [OPTIONS]
DESCRIPTION
xtrlock locks the X display until the user supplies their password. While locked, the cursor changes to a padlock icon and keyboard input is captured for authentication.
The lock is transparent, showing the desktop but preventing interaction.
PARAMETERS
-b
Blank the screen in addition to locking-f
Fork to background and return immediately
CAVEATS
X11 only. Does not blank screen by default. Requires proper PAM configuration for authentication.