[LightDM] disable and remove shutdown/restart/suspend/hibernate/ button on login screen

[xm xm]

Hello everyone,

I have CentOS 7+lightdm+xfce installed. 
I don't want any user( except root) to be able to hibernate/suspend/reboot/shutdown from the login screen. 
I would like to remove and disable those buttons.

Could anyone help me?

Thanks in advance!

xm


 		 	   		  
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