Saturday, 11 July 2009

Dos Commands

Command Description
Aansi.sysNSI.SYS Defines functions that change display graphics, control cursor movement, and reassign keys.
append Causes MS-DOS to look in other directories when editing a file or running a command.
arp Displays, adds, and removes arp information from network devices.
assign Assign a drive letter to an alternate letter.
assoc View the file associations.
at Schedule a time to execute commands or programs.
atmadm Lists connections and addresses seen by Windows ATM call manager.
attrib Display and change file attributes.
batch Recovery console command that executes a series of commands in a file.
bootcfg Recovery console command that allows a user to view, modify, and rebuild the boot.ini
break Enable / disable CTRL + C feature.
cacls View and modify file ACL's.
call Calls a batch file from another batch file.
cd Changes directories.
chcp Supplement the International keyboard and character set information.
chdir Changes directories.
chdsk Check the hard disk drive running FAT for errors.
chkntfs Check the hard disk drive running NTFS for errors.
choice Specify a listing of multiple options within a batch file.
cls Clears the screen.
cmd Opens the command interpreter.
color Easily change the foreground and background color of the MS-DOS window.
command Opens the command interpreter.
comp Compares files.
compact Compresses and uncompress files.
control Open Control Panel icons from the MS-DOS prompt.
convert Convert FAT to NTFS.
copy Copy one or more files to an alternate location.
ctty Change the computers input/output devices.
date View or change the systems date.
debug Debug utility to create assembly programs to modify hardware settings.
defrag Re-arrange the hard disk drive to help with loading programs.
del Deletes one or more files.
delete Recovery console command that deletes a file.
deltree Deletes one or more files and/or directories.
dir List the contents of one or more directory.
disable Recovery console command that disables Windows system services or drivers.
diskcomp Compare a disk with another disk.
diskcopy Copy the contents of one disk and place them on another disk.
doskey Command to view and execute commands that have been run in the past.
dosshell A GUI to help with early MS-DOS users.
drivparm Enables overwrite of original device drivers.
echo Displays messages and enables and disables echo.
edit View and edit files.
edlin View and edit files.
emm386 Load extended Memory Manager.
ename Recovery console command to enable a disable service or driver.
endlocal Stops the localization of the environment changes enabled by the setlocal command.
erase Erase files from computer.
exit Exit from the command interpreter.
expand Expand a Microsoft Windows file back to it's original format.
extract Extract files from the Microsoft Windows cabinets.
fasthelp Displays a listing of MS-DOS commands and information about them.
fc Compare files.
fdisk Utility used to create partitions on the hard disk drive.
find Search for text within a file.
findstr Searches for a string of text within a file.
fixboot Writes a new boot sector.
fixmbr Writes a new boot record to a disk drive.
for Boolean used in batch files.
format Command to erase and prepare a disk drive.
ftp Command to connect and operate on a FTP server.
ftype Displays or modifies file types used in file extension associations.
goto Moves a batch file to a specific label or location.
graftabl Show extended characters in graphics mode.
help Display a listing of commands and brief explanation.
if Allows for batch files to perform conditional processing.
ifshlp.sys 32-bit file manager.
ipconfig Network command to view network adapter settings and assigned values.
keyb Change layout of keyboard.
label Change the label of a disk drive.
lh Load a device driver in to high memory.
listsvc Recovery console command that displays the services and drivers.
loadfix Load a program above the first 64k.
loadhigh Load a device driver in to high memory.
lock Lock the hard disk drive.
logoff Logoff the currently profile using the computer.
logon Recovery console command to list installations and enable administrator login.
map Displays the device name of a drive.
md Command to create a new directory.
mem Display memory on system.
mkdir Command to create a new directory.
mode Modify the port or display settings.
more Display one page at a time.
move Move one or more files from one directory to another directory.
msav Early Microsoft Virus scanner.
msd Diagnostics utility.
msdex Utility used to load and provide access to the CD-ROM.
nbtstat Displays protocol statistics and current TCP/IP connections using NBT
net Update, fix, or view the network or network settings
netsh Configure dynamic and static network information from MS-DOS.
netstat Display the TCP/IP network protocol statistics and information.
nlsfunc Load country specific information.
nslookup Look up an IP address of a domain or host on a network.
path View and modify the computers path location.
pathping View and locate locations of network latency.
pause Command used in batch files to stop the processing of a command.
ping Test / send information to another network computer or network device.
popd Changes to the directory or network path stored by the pushd command.
power Conserve power with computer portables.
print Prints data to a printer port.
prompt View and change the MS-DOS prompt.
pushd Stores a directory or network path in memory so it can be returned to at any time.
qbasic Open the QBasic.
rd Removes an empty directory.
ren Renames a file or directory.
rename Renames a file or directory.
rmdir Removes an empty directory.
route View and configure windows network route tables.
runas Enables a user to execute a program on another computer.
scandisk Run the scandisk utility.
scanreg Scan registry and recover registry from errors.
set Change one variable or string to another.
setlocal Enables local environments to be changed without affecting anything else.
setver Change MS-DOS version to trick older MS-DOS programs.
share Installs support for file sharing and locking capabilities.
shift Changes the position of replaceable parameters in a batch program.
shutdown Shutdown the computer from the MS-DOS prompt.
smartdrv Create a disk cache in conventional memory or extended memory.
sort Sorts the input and displays the output to the screen.
start Start a separate window in Windows from the MS-DOS prompt.
subst Substitute a folder on your computer for another drive letter.
switches Remove add functions from MS-DOS.
sys Transfer system files to disk drive.
telnet Telnet to another computer / device from the prompt.
time View or modify the system time.
title Change the title of their MS-DOS window.
tracert Visually view a network packets route across a network.
tree View a visual tree of the hard disk drive.
type Display the contents of a file.
undelete Undelete a file that has been deleted.
unformat Unformat a hard disk drive.
unlock Unlock a disk drive.
ver Display the version information.
verify Enables or disables the feature to determine if files have been written properly.
vol Displays the volume information about the designated drive.
xcopy Copy multiple files, directories, and/or drives from one location to another.

DOS COMMANDS

DOS COMMANDS

APPEND
(External)

APPEND ;
APPEND [d:]path[;][d:]path[...]
APPEND [/X:on|off][/path:on|off] [/E]

Displays or sets the search path for data files. DOS will search the specified path(s) if the file is not found in the current path.


ASSIGN
(External)

ASSIGN x=y [...] /sta

Redirects disk drive requests to a different drive.


ATTRIB
(External)

ATTRIB [d:][path]filename [/S]
ATTRIB [+R|-R] [+A|-A] [+S|-S] [+H|-H] [d:][path]filename [/S]

Sets or displays the read-only, archive, system, and hidden attributes of a file or directory.


BACKUP
(External)

BACKUP d:[path][filename] d:[/S][/M][/A][/F:(size)] [/P][/D:date] [/T:time] [/L:[path]filename]

Makes a backup copy of one or more files. (In DOS Version 6, this program is stored on the DOS supplemental disk.)


BREAK
(Internal)

BREAK =on|off

Used from the DOS prompt or in a batch file or in the CONFIG.SYS file to set (or display) whether or not DOS should check for a Ctrl + Break key combination.


BUFFERS
(Internal)

BUFFERS=(number),(read-ahead number)

Used in the CONFIG.SYS file to set the number of disk buffers (number) that will be available for use during data input. Also used to set a value for the number of sectors to be read in advance (read-ahead) during data input operations.


CALL
(Internal)

CALL [d:][path]batchfilename [options]

Calls another batch file and then returns to current batch file to continue.


CHCP
(Internal)

CHCP (codepage)

Displays the current code page or changes the code page that DOS will use.


CHDIR
(Internal)

CHDIR (CD) [d:]path
CHDIR (CD)[..]

Displays working (current) directory and/or changes to a different directory.


CHKDSK
(External)

CHKDSK [d:][path][filename] [/F][/V]

Checks a disk and provides a file and memory status report.


CHOICE
(Internal)

CHOICE [/C[:]keys] [/N][/S][/T[:]c,nn] [text]

Used to provide a prompt so that a user can make a choice while a batch program is running.


CLS (Clear Screen)
(Internal)

CLS

Clears (erases) the screen.


COMMAND
(External)

COMMAND [d:][path] [device] [/P][/E:(size)] [/MSG][/Y [/C (command)|/K (command)]

Starts a new version of the DOS command processor (the program that loads the DOS Internal programs).


COMP
(External)

COMP [d:][path][filename] [d:][path][filename] [/A][/C][/D][/L][/N:(number)]

Compares two groups of files to find information that does not match. (See FC command).


COPY
(Internal)

COPY [/Y|-Y] [/A][/B] [d:][path]filename [/A][/B] [d:][path][filename] [/V]
or
COPY [/Y|-Y][/A][/B] [d:][path]filename+[d:][path]filename[...][d:][path][filename] [/V]

Copies and appends files.


COUNTRY
(Internal)

COUNTRY=country code,[code page][,][d:][filename]

Used in the CONFIG.SYS file to tell DOS to use country-specific text conventions during processing.


CTTY
(Internal)

CTTY (device)

Changes the standard I/O (Input/Output) device to an auxiliary device.


DATE
(Internal)

DATE mm-dd-yy

Displays and/or sets the system date.


DBLSPACE
(External)

DBLSPACE / automount=drives
DBLSPACE /chkdsk [/F] [d:]
DBLSPACE /compress d: [/newdrive=host:] [/reserve=size] [/F]
DBLSPACE /create d: [/newdrive=host:] [/reserve=size] [/size=size]
DBLSPACE /defragment [d:] ]/F]
DBLSPACE /delete d:
DBLSPACE /doubleguard=0|1
DBLSPACE /format d:
DBLSPACE [/info] [d:]
DBLSPACE /list
DBLSPACE /mount[=nnn] host: [/newdrive=d:]
DBLSPACE /ratio[=ratio] [d:] [/all]
DBLSPACE /size[=size] [/reserve=size] d:
DBLSPACE /uncompress d:
DBLSPACE /unmount [d:]

A program available with DOS 6.0 that allows you to compress information on a disk.


DEBUG
(External)

DEBUG [pathname] [parameters]

An MS-DOS utility used to test and edit programs.


DEFRAG
(External)

DEFRAG [d:] [/F][/S[:]order] [/B][/skiphigh [/LCD|/BW|/GO] [/H]
DEFRAG [d:] [/V][/B][/skiphigh] [/LCD]|/BW|/GO] [/H]

Optimizes disk performance by reorganizing the files on the disk.


DEL (ERASE)
(Internal)

DEL (ERASE) [d:][path]filename [/P]

Deletes (erases) files from disk.


DELOLDOS
(External)

DELOLDOS [/B]

Deletes all files from previous versions of DOS after a 5.0 or 6.0 installation.


DELTREE
(External)

DELTREE [/Y] [d:]path [d:]path[...]

Deletes (erases) a directory including all files and subdirectories that are in it.


DEVICE
(Internal)

DEVICE=(driver name)

Used in the CONFIG.SYS file to tell DOS which device driver to load.


DEVICEHIGH
(Internal)

DEVICEHIGH=(driver name)

Like DEVICE, DEVICEHIGH is used in the CONFIG.SYS file to tell DOS which device driver software to use for devices; however, this option is used to install the device driver into the upper memory area.


DIR
(Internal)

DIR [d:][path][filename] [/A:(attributes)] [/O:(order)] [/B][/C][/CH][/L][/S][/P][/W]

Displays directory of files and directories stored on disk.


DISKCOMP
(External)

DISKCOMP [d:] [d:][/1][/8]

Compares the contents of two diskettes.


DISKCOPY
(External)

DISKCOPY [d:] [d:][/1][/V][/M]

Makes an exact copy of a diskette.


DOS
(Internal)

DOS=[high|low],[umb|noumb]

Used in the CONFIG.SYS file to specify the memory location for DOS. It is used to load DOS into the upper memory area and to specify whether or not the upper memory blocks will be used.


DOSKEY
(External)

DOSKEY [reinstall] [/bufsize=size][/macros][/history][/insert|/overstrike] [macroname=[text]]

Loads the Doskey program into memory which can be used to recall DOS commands so that you can edit them.


DOSSHELL
(External)

DOSSHELL [/B] [/G:[resolution][n]]|[/T:[resolution][n]]

Initiates the graphic shell program using the specified screen resolution.


DRIVPARM
(Internal)

DRIVPARM= /D:(number) [/C] [/F:(form factor)] [/H:(number)] [/I][ /N][/S:(number)] [/T:(tracks)]

Used in the CONFIG.SYS file to set parameters for a disk drive.


ECHO
(Internal)

ECHO on|off
ECHO (message)

Displays messages or turns on or off the display of commands in a batch file.


EDIT
(External)

EDIT [d:][path]filename [/B][/G][/H][/NOHI]

Starts the MS-DOS editor, a text editor used to create and edit ASCII text files.


EMM386
(External)

EMM386 [on|off|auto] [w=on|off]

Enables or disables EMM386 expanded-memory support on a computer with an 80386 or higher processor.


EXE2BIN
(External)

EXE2BIN [d:][path]filename [d:][path]filename

Converts .EXE (executable) files to binary format.


EXIT
(Internal)

EXIT

Exits a secondary command processor.


EXPAND
(External)

EXPAND [d:][path]filename [[d:][path]filename[ . . .]]

Expands a compressed file.


FASTHELP
(External)

FASTHELP [command][command] /?

Displays a list of DOS commands with a brief explanation of each.


FASTOPEN
(External)

FASTOPEN d:[=n][/X]

Keeps track of the locations of files for fast access.


FC
(External)

FC [/A][/C][/L][/Lb n][/N][/T][/W][number] [d:][path]filename [d:][path]filename

or (for binary comparisons)
FC [/B][/number] [d:][path]filename [d:][path]filename

Displays the differences between two files or sets of files.


FCBS
(Internal)

FCBS=(number)

Used in the CONFIG.SYS file to specify the number of file-control blocks for file sharing.


FDISK
(External)

FDISK [/status]

Prepares a fixed disk to accept DOS files for storage.


FILES
(Internal)

FILES=(number)

Used in the CONFIG.Sys file to specify the maximum number of files that can be open at the same time.


FIND
(External)

FIND [/V][/C][/I][/N] زstringس [d:][path]filename[...]

Finds and reports the location of a specific string of text characters in one or more files.


FOR
(Internal)

FOR %%(variable) IN (set) DO (command)

or (for interactive processing)
FOR %(variable) IN (set) DO (command)

Performs repeated execution of commands (for both batch processing and interactive processing).


FORMAT
(External)

FORMAT d:[/1][/4][/8][/F:(size)] [/N:(sectors)] [/T:(tracks)][/B|/S][/C][/V:(label)] [/Q][/U][/V]

Formats a disk to accept DOS files.


GOTO
(Internal)

GOTO (label)

Causes unconditional branch to the specified label.


GRAFTABL
(External)

GRAFTABL [(code page)]
GRAFTABL [status]

Loads a table of character data into memory (for use with a color/graphics adapter).


GRAPHICS
(External)

GRAPHICS [printer type][profile] [/B][/R][/LCD][/PB:(id)] [/C][/F][/P(port)]

Provides a way to print contents of a graphics screen display.


HELP
(External)

HELP [command] [/B][/G][/H][/NOHI]

Displays information about a DOS command.


IF
(Internal)

IF [NOT] EXIST filename (command) [parameters]
IF [NOT] (string1)==(string2) (command) [parameters]
IF [NOT] ERRORLEVEL (number) (command) [parameters]

Allows for conditional operations in batch processing.


INCLUDE
(Internal)

INCLUDE= blockname

Used in the CONFIG.SYS file to allow you to use the commands from one CONFIG.SYS block within another.


INSTALL
(Internal)

INSTALL=[d: ][\path]filename [parameters]

Used in the CONFIG.SYS file to load memory-resident programs into conventional memory.


INTERLINK
(External)

INTERLINK [client[:]=[server][:]]

Connects two computers via parallel or serial ports so that the computers can share disks and printer ports.


INTERSVR
(External)

INTERSVR [d:][...][/X=d:][...] [/LPT:[n|address]] [/COM:[n|address]][/baud:rate] [/B][/V]
INTERSVR /RCOPY

Starts the Interlink server.


JOIN
(External)

JOIN d: [d:path]
JOIN d: [/D]

Allows access to the directory structure and files of a drive through a directory on a different drive.


KEYB
(External)

KEYB [xx][,][yyy][,][d:][path]filename [/E][/ID:(number)]

Loads a program that replaces the support program for U. S. keyboards.

LABEL
(External)

LABEL [d:][volume label]

Creates or changes or deletes a volume label for a disk.

LASTDRIVE
(Internal)

LASTDRIVE=(drive letter)

Used in the CONFIG.SYS file to set the maximum number of drives that can be accessed.

LOADFIX
(Internal)

LOADFIX [d:][path]filename [parameters]

Ensures that a program is loaded above the first 64K of conventional memory, and runs the program.

LOADHIGH
(Internal)

LOADHIGH (LH) [d:][path]filename [parameters]

Loads memory resident application into reserved area of memory (between 640K-1M).


MEM
(External)

MEM [/program|/debug|/classify|/free|/module(name)] [/page]

Displays amount of installed and available memory, including extended, expanded, and upper memory.


MEMMAKER
(External)

MEMMAKER [/B][/batch][/session][/swap:d] [/T][/undo][/W:size1,size2]

Starts the MemMaker program, a program that lets you optimize your computer's memory.


MENUCOLOR
(Internal)

MENUCOLOR=textcolor,[background]

Used in the CONFIG.SYS file to set the colors that will be used by DOS to display text on the screen.


MENUDEFAULT
(Internal)

MENUDEFAULT=blockname, [timeout]

Used in the CONFIG.SYS file to set the startup configuration that will be used by DOS if no key is pressed within the specified timeout period.


MENUITEM
(Internal)

MENUITEM=blockname, [menutext]

Used in the CONFIG.SYS file to create a start-up menu from which you can select a group of CONFIG.SYS commands to be processed upon reboot.


MIRROR
(External)

MIRROR [d:]path [d:] path [...]
MIRROR [d1:][d2:][...] [/T(drive)(files)] [/partn][/U][/1]

Saves disk storage information that can be used to recover accidentally erased files.


MKDIR
(MD) (Internal)

MKDIR (MD) [d:]path

Creates a new subdirectory.



MODE
(External)

MODE n
MODE LPT#[:][n][,][m][,][P][retry]
MODE [n],m[,T]
MODE (displaytype,linetotal)
MODE COMn[:]baud[,][parity][,][databits][,][stopbits][,][retry]
MODE LPT#[:]=COMn [retry]
MODE CON[RATE=(number)][DELAY=(number)]
MODE (device) CODEPAGE PREPARE=(codepage) [d:][path]filename
MODE (device) CODEPAGE PREPARE=(codepage list) [d:][path]filename
MODE (device) CODEPAGE SELECT=(codepage)
MODE (device) CODEPAGE [/STATUS]
MODE (device) CODEPAGE REFRESH

Sets mode of operation for devices or communications.


MORE
(External)

MORE < (filename or command)
(name)|MORE

Sends output to console, one screen at a time.



MOVE
(Internal)

MOVE [/Y|/-Y] [d:][path]filename[,[d:][path]filename[...]] destination

Moves one or more files to the location you specify. Can also be used to rename directories.



MSAV
(External)

MSAV [d:] [/S|/C][/R][/A][/L][/N][/P][/F][/video][/mouse]
MSAV /video

Scans your computer for known viruses.



MSBACKUP
(External)

MSBACKUP [setupfile] [/BW|/LCD|/MDA]

Used to backup or restore one or more files from one disk to another.



MSCDEX
(External)

MSCDEX /D:driver [/D:driver2. . .] [/E][/K][/S][/V][/L:letter] [/M:number]

Used to gain access to CD-ROM drives (new with DOS Version 6).



MSD
(External)

MSD [/B][/I]
MSD [/I] [/F[d:][path]filename [/P[d:][path]filename [/S[d:][path]filename

Provides detailed technical information about your computer.



NLSFUNC
(External)

NLSFUNC [d:][path]filename

Used to load a file with country-specific information.



NUMLOCK
(Internal)

NUMLOCK=on|off

Used in the CONFIG.SYS file to specify the state of the NumLock key.



PATH
(Internal)

PATH;
PATH [d:]path[;][d:]path[...]

Sets or displays directories that will be searched for programs not in the current directory.



PAUSE
(Internal)

PAUSE [comment]

Suspends execution of a batch file until a key is pressed.



POWER
(External)

POWER [adv:max|reg|min]|std|off]

Used to turn power management on and off, report the status of power management, and set levels of power conservation.



PRINT
(External)

PRINT [/B:(buffersize)] [/D:(device)] [/M:(maxtick)] [/Q:(value] [/S:(timeslice)][/U:(busytick)] [/C][/P][/T] [d:][path][filename] [...]

Queues and prints data files.



PROMPT
(Internal)

PROMPT [prompt text] [options]

Changes the DOS command prompt.



RECOVER
(External)

RECOVER [d:][path]filename
RECOVER d:

Resolves sector problems on a file or a disk. (Beginning with DOS Version 6, RECOVER is no longer available ).



REM
(Internal)

REM [comment]

Used in batch files and in the CONFIG.SYS file to insert remarks (that will not be acted on).



RENAME (REN)
(Internal)

RENAME (REN) [d:][path]filename [d:][path]filename

Changes the filename under which a file is stored.



REPLACE
(External)

REPLACE [d:][path]filename [d:][path] [/A][/P][/R][/S][/U][/W]

Replaces stored files with files of the same name from a different storage location.



RESTORE
(External)

RESTORE d: [d:][path]filename [/P][/S][/B:mm-dd-yy] [/A:mm-dd-yy][/E:hh:mm:ss] [/L:hh:mm:ss] [/M][/N][/D]

Restores to standard disk storage format files previously stored using the BACKUP command.



RMDIR (RD)
(Internal)

RMDIR (RD) [d:]path

Removes a subdirectory.



SCANDISK
(External)

SCANDISK [d: [d: . . .]|/all][/checkonly|/autofix[/nosave]|/custom][/surface][/mono][/nosummay]
SCANDISK volume-name[/checkonly|/autofix[/nosave]|/custom][/mono][/nosummary]
SCANDISK /fragment [d:][path]filename
SCANDISK /undo [undo-d:][/mono]

Starts the Microsoft ScanDisk program which is a disk analysis and repair tool used to check a drive for errors and correct any problems that it finds.



SELECT
(External)

SELECT [d:] [d:][path] [country code][keyboard code]

Formats a disk and installs country-specific information and keyboard codes (starting with DOS Version 6, this command is no longer available).



SET
(Internal)

SET (string1)=(string2)

Inserts strings into the command environment. The set values can be used later by programs.


SETVER
(External)

SETVER [d:]:path][filename (number)][/delete][/quiet]

Displays the version table and sets the version of DOS that is reported to programs.



SHARE
(External)

SHARE [/F:space] [/L:locks]

Installs support for file sharing and file locking.



SHELL
(Internal)

SHELL=[d:][path]filename [parameters]

Used in the CONFIG.SYS file to specify the command interpreter that DOS should use.



SHIFT
(Internal)

SHIFT

Increases number of replaceable parameters to more than the standard ten for use in batch files.



SORT
(External)

SORT [/R][/+n] < (filename)
SORT [/R][/+n] > (filename2)

Sorts input and sends it to the screen or to a file.



STACKS
(Internal)

STACKS=(number),(size)

Used in the CONFIG.SYS file to set the number of stack frames and the size of each stack frame.



SUBMENU
(Internal)

SUBMENU=blockname, [menutext]

Used in the CONFIG.SYS file to create a multilevel menu from which you can select start-up options.



SUBST
(External)

SUBST d: d:path
SUBST d: /D

Substitutes a virtual drive letter for a path designation.



SWITCHES
(Internal)

SWITCHES= [/K][/F][/N][/W]

Used in the CONFIG.SYS file to configure DOS in a special way; for example, to tell DOS to emulate different hardware configurations.



SYS
(External)

SYS [source] d:

Transfers the operating system files to another disk.



TIME
(Internal)

TIME hh:mm[:ss][.cc][A|P]

Displays current time setting of system clock and provides a way for you to reset the time.



TREE
(External)

TREE [d:][path] [/A][/F]

Displays directory paths and (optionally) files in each subdirectory.



TYPE
(Internal)

TYPE [d:][path]filename

Displays the contents of a file.



UNDELETE
(External)

UNDELETE [d:][path][filename] [/DT|/DS|/DOS]
UNDELETE [/list|/all|/purge[d:]|/status|/load|/U|/S[d:]|/Td:[-entries]]

Restores files deleted with the DELETE command.



UNFORMAT
(External)

UNFORMAT d: [/J][/L][/test][/partn][/P][/U]

Used to undo the effects of formatting a disk.



VER
(Internal)

VER

Displays the DOS version number.



VERIFY
(Internal)

VERIFY on|off

Turns on the verify mode; the program checks all copying operations to assure that files are copied correctly.



VOL
(Internal)

VOL [d:]

Displays a disk's volume label.



VSAFE
(External)

VSAFE [/option[+|-]...] [/NE][/NX][Ax|/Cx] [/N][/D][/U]

VSAFE is a memory-resident program that continuously monitors your computer for viruses and displays a warning when it finds one.



XCOPY
(External)

XCOPY [d:][path]filename [d:][path][filename] [/A][/D:(date)] [/E][/M][/P][/S][/V][/W][Y\-Y]
Copies directories, subdirectories, and files.


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Syntax Notes
To be functional, each DOS command must be entered in a particular way: this command entry structure is known as the command's "syntax." The syntax "notation" is a way to reproduce the command syntax in print.

For example, you can determine the items that are optional, by looking for information that is printed inside square brackets. The notation [d:], for example, indicates an optional drive designation. The command syntax, on the other hand, is how YOU enter the command to make it work.


Command Syntax Elements
1. Command Name

The DOS command name is the name you enter to start the DOS program (a few of the DOS commands can be entered using shortcut names). The DOS command name is always entered first. In this book, the command is usually printed in uppercase letters, but you can enter command names as either lowercase or uppercase or a mix of both.

2. Space

Always leave a space after the command name.

3. Drive Designation

The drive designation (abbreviated in this book as "d:") is an option for many DOS commands. However, some commands are not related to disk drives and therefore do not require a drive designation. Whenever you enter a DOS command that deals with disk drives and you are already working in the drive in question, you do not have to enter the drive designator. For example, if you are working in drive A (when the DOS prompt A> is showing at the left side of the screen) and you want to use the DIR command to display a directory listing of that same drive, you do not have to enter the drive designation. If you do not enter a drive designation, DOS always assumes you are referring to the drive you are currently working in (sometimes called the "default" drive).

4. A Colon

When referring to a drive in a DOS command, you must always follow the drive designator with a colon (:) (this is how DOS recognizes it as a drive designation).

5. Pathname

A pathname (path) refers to the path you want DOS to follow in order to act on the DOS command. As described in Chapter 3, it indicates the path from the current directory or subdirectory to the files that are to be acted upon.

6. Filename

A filename is the name of a file stored on disk. As described in Chapter 1, a filename can be of eight or fewer letters or other legal characters.

7. Filename Extension

A filename extension can follow the filename to further identify it. The extension follows a period and can be of three or fewer characters. A filename extension is not required.

8. Switches

Characters shown in a command syntax that are represented by a letter or number and preceded by a forward slash (for example, "/P") are command options (sometimes known as "switches"). Use of these options activate special operations as part of a DOS command's functions.

9. Brackets

Items enclosed in square brackets are optional; in other words, the command will work in its basic form without entering the information contained inside the brackets.

10. Ellipses

Ellipses (...) indicate that an item in a command syntax can be repeated as many times as needed.

11. Vertical Bar

When items are separated by a vertical bar (|), it means that you enter one of the separated items. For example: ON | OFF means that you can enter either ON or OFF, but not both.

Friday, 10 July 2009

ABBREVIATIONS

ACC -ADVANCE AUDIO CODEC
A2DP -ADVANCED AUDIO DISTRIBUTION PROFILE
EDGE -ENHANCED DATA RATES for GLOBAL EVOLUTION
GPRS -GENERAL PACKETRADIO SERVICE