http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/ntcmds_o.mspx

If you'd like to learn more about each of these commands, as well as some that aren't listed, visit Microsoft's command-line reference page.

 

• bootcfg
  View your boot loader settings, such as your default OS and selection timeout, as well as your boot entries and load options.

   

   

• defrag
  You probably already guessed that this defrags your hard drive. Type only "defrag" into your command prompt to get a list of possible arguments, such as the drive letter and the type of output.

   

• diskpart
  Manages your disk partitions. After you type "diskpart" into your command prompt, your prompt will become "DISKPART." Type a question mark to get a list of possible arguments. Type exit to leave diskpart.

   

• driverquery
  Will get you a nice list of your drivers and their properties.

   

• fsutil
  This is a handy command. You can do everything from managing your hardlinks to querying the free space in a volume. Type "fsutil" into your command prompt, and you'll see a list of options. I choose "fsinfo" from the list, so I type "fsutil fsinfo" into the prompt. Now I get even more options, but I choose drives by typing "fsutil fsinfo drives." It's fun, it's easy, and you'll get the hang of it. Explore this utility. There are a lot of cool features and hidden twists.

   

• getmac
  This gets the MAC (Media Access Control) address.

   

• gpresult
  Get the RSoP, user settings, and computer group policy settings.

   

• helpctr
  Starts the Help and Support Center.

   

• ipseccmd
  Configures Internet protocol security (IPSec) policies in the directory service or in a local or remote Registry. Ipseccmd is a command-line version of the IP Security Policies Microsoft Management Console (MMC) snap-in.

   

• netsh
  A network configuration tool. Type "netsh" to enter the tool, or "netsh /?" to learn more about it. To exit this tool, type "exit" at the "netsh>" prompt.

   

• openfiles
  Allows an administrator to display or disconnect open files in XP professional. Type "openfiles /?" for a list of possible parameters.

   

• pagefileconfig
  Displays and configures the paging file Virtual Memory settings of a system.

   

• prncnfg
  Configures or displays configuration information about a printer.

   

• prnjobs
  Pauses, resumes, cancels, and lists print jobs.

   

• recover
  This command attempts to recover readable information from a damaged disk. Type "recover" to get the syntax.

   

• reg
  The console registry tool. Get syntax help when you type "reg" into the prompt. You can export the registry, copy, restore, compare, and more.

   

   

• schtasks
  The administrator can schedule, run, change, or delete tasks on a local or remote machine. Type "schtasks /?" without the quotes for a list of options.

   

   

• sfc
  The system file checker scans protected system files and replaces the ones you (or your applications) hacked beyond repair with the real, official Microsoft versions. Type "sfc" into the command prompt to get a list of options.

   

   

• shutdown
  You can shut down or restart your own computer, or an administrator can shut down or restart a remote computer. Type "shutdown" into your command prompt to see a list of possible arguments.

   

   

• systeminfo
  Basic system configuration information, such as the system type, the processor type, your time zone, your virtual memory settings, and much more.

   

   

• tasklist
  Want to know what's going on behind the scenes? Type "tasklist" into the command prompt, and get a list of current processes.

   

   

• taskkill
  Now that you know what's going on behind the scenes, maybe you want to shut a few of these extraneous tasks down. That's where taskkill comes in. Type "taskkill /?" for a quick lesson in the syntax of the command, then shut down all those random processes. I just killed my MS messenger by typing "taskkill /PID 1680." I got the PID from running tasklist, above.

   

   

• typeperf
  Writes performance-counter data to the command window or to a supported log file format.