How to know the Computer Specifications in Ubuntu

Just like as in Windows may have the command Run -> dxdiag Then it would appear we spec PC in Linux is also available.
To Learn Computer Specs us in Linux, especially in Ubuntu may be more complete information than the Si Windows with default program

the steps are as follows:

Application -> Accessories -> Terminal enter the following command:

$ sudo lshw

After that we will know the specifications of the PC in Terminal
But it is better if we create an HTML file to be more userfriendly GUI
with the command:

$ sudo lshw -html > infohardware.html

then open infohardware.html with browser like firefox / opera .