How to find out if I am using wayland or X11?

• https://unix.stackexchange.com/questions/202891/how-to-know-whether-wayland-or-x11-is-being-used

Find out the session ID

loginctl

SESSION  UID USER            SEAT  TTY
      4 1000 <YOURUSERNAME>  seat0 

1 sessions listed.

Session ID seems to be “4” in my case.

Display the the type of session

loginctl show-session <SESSION_ID> -p Type

Type=x11

Handy oneliner:

loginctl show-session $(loginctl | awk '/'"$USER"'/{print $1}') -p Type

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~~DISCUSSION~~