Ritesh’s Technical Blog

Posts Tagged ‘Regedit

An A-Z Index of the Windows XP command line

ADDUSERS Add or list users to/from a CSV file
ARP      Address Resolution Protocol
ASSOC    Change file extension associations
ASSOCIAT One step file association
AT       Schedule a command to run at a later time
ATTRIB   Change file attributes

BOOTCFG  Edit Windows boot settings
BROWSTAT Get domain, browser and PDC info

CACLS    Change file permissions
CALL     Call one batch program from another
CD       Change Directory - move to a specific Folder
CHANGE   Change Terminal Server Session properties
CHKDSK   Check Disk - check and repair disk problems
CHKNTFS  Check the NTFS file system
CHOICE   Accept keyboard input to a batch file
CIPHER   Encrypt or Decrypt files/folders
CleanMgr Automated cleanup of Temp files, recycle bin
CLEARMEM Clear memory leaks
CLIP     Copy STDIN to the Windows clipboard.
CLS      Clear the screen
CLUSTER  Windows Clustering
CMD      Start a new CMD shell
COLOR    Change colors of the CMD window
COMP     Compare the contents of two files or sets of files
COMPACT  Compress files or folders on an NTFS partition
COMPRESS Compress individual files on an NTFS partition
CON2PRT  Connect or disconnect a Printer
CONVERT  Convert a FAT drive to NTFS.
COPY     Copy one or more files to another location
CSCcmd   Client-side caching (Offline Files)
CSVDE    Import or Export Active Directory data 

DATE     Display or set the date
Dcomcnfg DCOM Configuration Utility
DEFRAG   Defragment hard drive
DEL      Delete one or more files
DELPROF  Delete NT user profiles
DELTREE  Delete a folder and all subfolders
DevCon   Device Manager Command Line Utility
DIR      Display a list of files and folders
DIRUSE   Display disk usage
DISKCOMP Compare the contents of two floppy disks
DISKCOPY Copy the contents of one floppy disk to another
DNSSTAT  DNS Statistics
DOSKEY   Edit command line, recall commands, and create macros
DSADD    Add user (computer, group..) to active directory
DSQUERY  List items in active directory
DSMOD    Modify user (computer, group..) in active directory

ECHO     Display message on screen
ENDLOCAL End localisation of environment changes in a batch file
ERASE    Delete one or more files
EXIT     Quit the current script/routine and set an errorlevel.
EXPAND   Uncompress files
EXTRACT  Uncompress CAB files

FC       Compare two files
FDISK    Disk Format and partition
FIND     Search for a text string in a file
FINDSTR  Search for strings in files
FOR /F   Loop command: against a set of files
FOR /F   Loop command: against the results of another command
FOR      Loop command: all options Files, Directory, List
FORFILES Batch process multiple files
FORMAT   Format a disk
FREEDISK Check free disk space (in bytes)
FSUTIL   File and Volume utilities
FTP      File Transfer Protocol
FTYPE    Display or modify file types used in file extension associations

GLOBAL   Display membership of global groups
GOTO     Direct a batch program to jump to a labelled line

HELP     Online Help
HFNETCHK Network Security Hotfix Checker 

IF       Conditionally perform a command
IFMEMBER Is the current user in an NT Workgroup
IPCONFIG Configure IP

KILL     Remove a program from memory

LABEL    Edit a disk label
LOCAL    Display membership of local groups
LOGEVENT Write text to the NT event viewer.
LOGOFF   Log a user off
LOGTIME  Log the date and time in a file

MAPISEND Send email from the command line
MEM      Display memory usage
MD       Create new folders
MKLINK   Create a symbolic link (linkd)
MODE     Configure a system device
MORE     Display output, one screen at a time
MOUNTVOL Manage a volume mount point
MOVE     Move files from one folder to another
MOVEUSER Move a user from one domain to another
MSG      Send a message
MSIEXEC  Microsoft Windows Installer
MSINFO   Windows NT diagnostics
MSTSC    Terminal Server Connection (Remote Desktop Protocol)
MUNGE    Find and Replace text within file(s)
MV       Copy in-use files

NET      Manage network resources
NETDOM   Domain Manager
NETSH    Configure network protocols
NETSVC   Command-line Service Controller
NBTSTAT  Display networking statistics (NetBIOS over TCP/IP)
NETSTAT  Display networking statistics (TCP/IP)
NOW      Display the current Date and Time
NSLOOKUP Name server lookup
NTBACKUP Backup folders to tape
NTRIGHTS Edit user account rights

PATH     Display or set a search path for executable files
PATHPING Trace route plus network latency and packet loss
PAUSE    Suspend processing of a batch file and display a message
PERMS    Show permissions for a user
PERFMON  Performance Monitor
PING     Test a network connection
POPD     Restore the previous value of the current directory saved by PUSHD
PORTQRY  Display the status of ports and services
PRINT    Print a text file
PRNCNFG  Display, configure or rename a printer
PRNMNGR  Add, delete, list printers set the default printer
PROMPT   Change the command prompt
PsExec     Execute process remotely
PsFile     Show files opened remotely
PsGetSid   Display the SID of a computer or a user
PsInfo     List information about a system
PsKill     Kill processes by name or process ID
PsList     List detailed information about processes
PsLoggedOn Who's logged on (locally or via resource sharing)
PsLogList  Event log records
PsPasswd   Change account password
PsService  View and control services
PsShutdown Shutdown or reboot a computer
PsSuspend  Suspend processes
PUSHD    Save and then change the current directory

QGREP    Search file(s) for lines that match a given pattern.

RASDIAL  Manage RAS connections
RASPHONE Manage RAS connections
RECOVER  Recover a damaged file from a defective disk.
REG      Registry: Read, Set, Export, Delete keys and values
REGEDIT  Import or export registry settings
REGSVR32 Register or unregister a DLL
REGINI   Change Registry Permissions
REM      Record comments (remarks) in a batch file
REN      Rename a file or files.
REPLACE  Replace or update one file with another
RD       Delete folder(s)
RDISK    Create a Recovery Disk
RMTSHARE Share a folder or a printer
ROBOCOPY Robust File and Folder Copy
ROUTE    Manipulate network routing tables
RUNAS    Execute a program under a different user account
RUNDLL32 Run a DLL command (add/remove print connections)

SC       Service Control
SCHTASKS Create or Edit Scheduled Tasks
SCLIST   Display NT Services
ScriptIt Control GUI applications
SET      Display, set, or remove environment variables
SETLOCAL Control the visibility of environment variables
SETX     Set environment variables permanently
SHARE    List or edit a file share or print share
SHIFT    Shift the position of replaceable parameters in a batch file
SHORTCUT Create a windows shortcut (.LNK file)
SHOWGRPS List the NT Workgroups a user has joined
SHOWMBRS List the Users who are members of a Workgroup
SHUTDOWN Shutdown the computer
SLEEP    Wait for x seconds
SOON     Schedule a command to run in the near future
SORT     Sort input
START    Start a separate window to run a specified program or command
SU       Switch User
SUBINACL Edit file and folder Permissions, Ownership and Domain
SUBST    Associate a path with a drive letter
SYSTEMINFO List system configuration

TASKLIST List running applications and services
TIME     Display or set the system time
TIMEOUT  Delay processing of a batch file
TITLE    Set the window title for a CMD.EXE session
TOUCH    Change file timestamps
TRACERT  Trace route to a remote host
TREE     Graphical display of folder structure
TYPE     Display the contents of a text file

USRSTAT  List domain usernames and last login

VER      Display version information
VERIFY   Verify that files have been saved
VOL      Display a disk label

WHERE    Locate and display files in a directory tree
WHOAMI   Output the current UserName and domain
WINDIFF  Compare the contents of two files or sets of files
WINMSD   Windows system diagnostics
WINMSDP  Windows system diagnostics II
WMIC     WMI Commands

XCACLS   Change file permissions
XCOPY    Copy files and folders

source:http://www.ss64.com/index.html

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Understanding Regedit

The Microsoft Registry Editor enables you to view, search for, and change settings in your system registry, which contains information about how your computer runs. Windows stores its configuration information in a database called the registry which can be accessed using Regedit.exe(Registry Editor). The registry contains profiles for each user of the computer and information about system hardware, installed programs, and property settings. Windows continually references this information during its operation. Although you can use Registry Editor to inspect and modify the registry, doing so is not recommended, as making incorrect changes can damage your system.

Registry Editor overview
Registry Editor is an advanced tool for viewing and changing settings in your system registry which contains information about how your computer runs. Windows stores its configuration information in a database (the registry) that is organized in a tree format.When you view the registry in the Microsoft Registry Editor its hierarchical nature becomes obvious. The editor presents an Explorer-like view of the registry, with a tree in the left pane and data in the right

Arcitecture of regedit

The registry tree is divided into six broad sections (five in NT). HKEY_CLASSES_ROOT HKEY_CURRENT_USER HKEY_LOCAL_MACHINE HKEY_USERS HKEY_CURRENT_CONFIG HKEY_DYN_DATA Folders represent keys in the registry and are shown in the navigation area on the left side of the Registry Editor window. On the left side below My Computer their are five keys HKEY_CLASSES_ROOT, HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE, HKEY_USERS, HKEY_CURRENT_CONFIG, HKEY_DYN_DATA. On expanding these Keys we’ll get the sub keys. In the right side area, the entries in a particular sub key are displayed, which are Name(Contains name of the value), Type(contains type of the value), and Data(Contains associated data of the value.)When you double-click a entry, it opens an editing dialog box. At the status bar of regedit path is shown.

navigating regedit

You should not edit your registry unless it is absolutely necessary. If there is an error in your registry, your computer may not function properly. If this happens, you can restore the registry to the same version you were using when you last successfully started your computer Regedit.exe is automatically installed during setup and is stored in same folder as is Windows. To start Regedit.exe

  1. Click Start, and then click Run.
  2. Type Regedit, and then click OK.

Navigation
The navigation area of the Registry Editor displays folders, each of which represents a predefined key (a key that represents one of the main division of the registry for eg: HKEY_LOCAL_MACHINE ) on the local computer. When accessing the registry of a remote computer, only two predefined keys, HKEY_USERS and HKEY_LOCAL_MACHINE, appear.

Folder/predefined key Description
HKEY_CURRENT_USER Contains the root of the configuration information for the user who is currently logged on. The user’s folders, screen colors, and Control Panel settings are stored here. This information is referred to as a user’s profile.
HKEY_USERS Contains the root of all user profiles on the computer. HKEY_CURRENT_USER is a subkey of HKEY_USERS.
HKEY_LOCAL_MACHINE Contains configuration information particular to the computer (for any user).
HKEY_CLASSES_ROOT Is a subkey of HKEY_LOCAL_MACHINE\Software. The information stored here ensures that the correct program opens when you open a file by using Windows Explorer.
HKEY_CURRENT_CONFIG Contains information about the hardware profile used by the local computer at system startup.

The following table lists the data types currently defined and used by the system.

Data type Description
REG_BINARY Raw binary data. Most hardware component information is stored as binary data and is displayed in Registry Editor in hexadecimal format.
REG_DWORD Data represented by a number that is 4 bytes long. Many parameters for device drivers and services are this type and are displayed in Registry Editor in binary, hexadecimal, or decimal format.
REG_EXPAND_SZ A variable-length data string. This data type includes variables that are resolved when a program or service uses the data.
REG_MULTI_SZ A multiple string. Values that contain lists or multiple values in a form that people can read are usually this type. Entries are separated by spaces, commas, or other marks.
REG_SZ A fixed-length text string.
REG_FULL_RESOURCE_DESCRIPTOR A series of nested arrays designed to store a resource list for a hardware component or driver.

Add a key

Caution

  • Incorrectly editing the registry may severely damage your system. Before making changes to the registry, you should back up any valued data on your computer.
  • You must back up your registry before tweaking into it or it may lead you to reinstall your operating system.
  • You can search for lot of registry backup tool an use any one of them, like ERUNT or click here for alternate methods of backing up registry.

Referrences


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