I have a MacBook Pro and Dell Vostro with Windows 10 and Ubuntu installed.
Is there any way so I can use Dell Vostro laptop as extended monitor for MacBook pro using HDMI cable.
I'm scared if I put HDMI in both the port of MacBook and dell.
The HDMI ports on laptops are only output. And for your purpose you need device with HDMI input. So the answer is no, not with serious hardware intervention