I couldn't organize the answers in this reply box so I wrote them in a notepad and uploaded them into Mediafire,
here's the link.
But that's not what I use CMD for, I use it to make my life easier with script, for exemples I've coded 4 scripts one of 'em creates a log in a hidden folder saying when was the computer accessed and if the password was provided or not I also made it so I can remotely shutdown my computer (via Dropbox) instantly or by a timer.
The other is a shutdown timer basicly you set a time and it'll shutdown after the time passes.
The 3rd is a scripts that writes the seconds the computer was on until it was shutdown, and it also provides the info if the computer was properly shutdown or crashed.
And my last one is a Cloud Saving utility (I just love my work xP) it backs up all saves of the listed games on your computer to the Cloud (Dropbox or Google Drive) and restors them when I change computer (it also backs 'em up when you play a game and then exit).
Yep that's what I use CMD for, when I was a kid I also did lots of sh*t with it, thing like the ones you described and much more.