Know Your Linux System
Get various kinds of system information in Linux command line.
How much cores my CPU have?
Is the remote server a VM or baremetal?
How many disks the server has and how much free space it has?
What kernel am I running?
As you start using Linux, you'll have the need for knowing your system. The good thing is that you can do all this in the command line.
And that's the better way of getting various system details as you are not dependent on the distribution or desktop environment you are using.
This page here is a collection of various tools and tips for getting Linux system details.