How to write a list of local users to a text file from command line (in the example below, the text will be created on the desktop - check the path):

C:\Users\Administrateur\Desktop>[color=blue]wmic useraccount list >userlist.txt[/color]

How to get network information (hostname, ip addresses, dns, etc):

C:\Users\dork>[color=green]ipconfig /all[/color]

Windows IP Configuration

   Host Name . . . . . . . . . . . . : GZDORK
   Primary Dns Suffix  . . . . . . . : gz.ro
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : gz.ro

Ethernet adapter Production:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Intel(R) PRO/1000 MT Network Connection
   Physical Address. . . . . . . . . : 00-0A-92-96-A3-6D
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv4 Address. . . . . . . . . . . : 10.17.69.61(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 10.17.69.1
   DNS Servers . . . . . . . . . . . : 10.17.69.52
   NetBIOS over Tcpip. . . . . . . . : Disabled

How to get hard disk information:

C:\Users\dork>[color=green]wmic logicaldisk get size,freespace,caption[/color]
Caption  FreeSpace   Size
C:       9641156608  53684989952
D:       4927332352  32209104896

How to get memory size from windows command line with systeminfo or wmic:

C:\Users\dork>[color=green]systeminfo | findstr /c:"Total Physical Memory"[/color]
Total Physical Memory:     16,383 MB

C:\Users\dork>[color=green]wmic memorychip get capacity[/color]
Capacity
17179869184

How to login as another user in cmd (did it from cygwin):

C:\Users\gzuser>runas /user:gzuser@gzdomain cmd
Enter the password for gzuser@gzdomain:
Attempting to start cmd as user "gzuser@gzdomain" ...

How to get the AD groups with net user (will truncate the groups that are too long):

PS: /DOMAIN must be written as is.
\> net user /DOMAIN your_username

How to get the AD groups with gpresult (will not truncate the groups that are too long):

PS: /user must be written as is.
\> gpresult /user your_username /r