http://www.thegeekstuff.com/

there are lots of articles on Linux/Vim/Others.

they dig depth of the linux commands.

e.g.

lshw -class memory

lshw -class disk

lshw -short

class type:

address

bridge

bus

communication

disk

display

generic

input

memory

multimedia

network

power

printer

processor

storage

system

tape

volume