Which Display Manger i am using ?

[jeetu_chaudhari]

How i can check which Display Manger i am using like whether KDE or GNOME ?

is there any command to see it ?

[nature]

well if you are talking about desktop enviroments,there is a file Xclients-default
or Xclients in your home directory.
The content of the file gives the desktop you are using,switchdesk can be used to change the desktop.
thanks

[techieMoe]

How i can check which Display Manger i am using like whether KDE or GNOME ?

is there any command to see it ?

It should be rather obvious. Do you see a "K" Menu at the bottom? If not you're probably running Gnome.

[Zelmo]

I'm reading this question as asking about whether KDM, GDM, or XDM is running, rather than which DE is in use. If that's the case, run

$ ps -e | grep dm

and it should return which of the three is running (if any).

[freak132]

Would you be able to get us a screenshot or picture of what you'd like us to identify, otherwise there's usually a 'about' button somehwere that will tell you what software it is and what version.