1. Lệnh Ping : Cú pháp: Code: ping ip/host [/t][/a][/l][/n]

“I've learned that people will forget what you said, people will forget what you did, but people 
will never forget how you made them feel” ~ Maya Angelou
DIR
 
Display a list of files and subfolders 
Syntax 
DIR [pathname(s)] [display_format] [file_attributes] [sorted] 
[time] [options] 
Key 
[pathname] The drive, folder, and/or files to display,
this can include wildcards: 
* Match any characters 
? Match any ONE character 
[display_format] 
/P Pause after each screen of data. 
/W Wide List format, sorted horizontally. 
/D Wide List format, sorted by vertical column. 
[file_attributes] /A:  
/A:D Folder /A:-D NOT Folder 
/A:R Read-only /A:-R NOT Read-only
/A:H Hidden /A:-H NOT Hidden 
/A:A Archive /A:-A NOT Archive 
/A Show all files 
Several attributes may be combined e.g. /A:HD-R 
[sorted] Sorted by /O: 
/O:N Name /O:-N Name 
/O:S file Size /O:-S file Size 
/O:E file Extension /O:-E file Extension 
/O:D Date & time /O:-D Date & time 
/O:G Group folders first /O:-G Group folders last 
several attributes may be combined e.g. /O:GEN 
[time] /T: the time field to display & use for sorting 
/T:C Creation 
/T:A Last Access 
/T:W Last Written (default) 
[options] 
/S include all subfolders. 
/R Display alternate data streams. (Vista and above) 
/B Bare format (no heading, file sizes or summary). 
/L use Lowercase. 
/Q Display the owner of the file. 
/N long list format where filenames are on the far right. 

/X As for /N but with the short filenames included. 
/C Include thousand separator in file sizes.
/-C Don’t include thousand separator in file sizes. 
/4 Display four-digit years 
The switches above may be preset by adding them to an environment variable called DIRCMD.
For example: 
SET DIRCMD=/O:N /S
Override any preset DIRCMD switches by prefixing the switch with -
For example: 
DIR *.* /-S
Upper and Lower Case filenames:
Filenames longer than 8 characters - will always display the filename with mixed case as 
entered. 
Filenames shorter than 8 characters - may display the filename in upper or lower case - this may 
vary from one client to another (registry setting) 
To obtain a bare DIR format (no heading or footer info) but retain all the details, pipe the output 
of DIR into FIND, this assumes that your date separator is
/
DIR c:\temp\*.* | FIND "/" 
FOR /f "tokens=*" %%G IN ('dir c:\temp\*.* ^| find "/"') DO echo %%G 
All file sizes are shown in 
bytes
. 
Normally 
DIR /b
will return just the filename, however when displaying subfolders with 
DIR /b 
/s
the command will return a 
full pathname
. 
On Windows Vista and later, a list of alternate data streams can be obtained using 
DIR /R
, on 
earlier operating systems, the SysInternals utility 
streams
 can be used instead. 
DIR is an 
internal
 command. 
“There it was, hidden in alphabetical order” ~ Rita Holt
DIRUSE
 (
2K Resource Kit / XP Support Tools
) 
Display disk usage 
Syntax 
DIRUSE [options] Folders... 
Options 
/M Display in Mb 
/K Display in Kb 
/B Display in bytes (default) 
/, Use thousand separator when displaying sizes.
/Q:# 
Quota limit, mark folders that exceed the size (#) with a 
"!". 
set %errorlevel% to ONE if any folders are found that 
exceed the specified size 
/* Report on one level of subfolders (top-level folders) 
/D Display only folders that exceed specified sizes. 
/S Include detail of every subfolder in the output 
/O Don’t check subfolders for quota overflow. 

/V Display progress report for every subfolder 
/C Use Compressed size instead of apparent size. 
/L Output overflows to logfile .\DIRUSE.LOG. 
/A generate an alert if quota is exceeded 
(requires the Alerter service) 
Note: the '-' symbol can be used in place of the '/' symbol.
Example
C:\> DIRUSE /M /q:1.5 /* e:\users
“Work is achieved by those employees who have not yet reached their level of incompetence” ~ 
Laurence J. Peter (The Peter Principle)
DiskPart (Windows 7)
 
Disk Administration, Partition a disk. This page documents the Windows 7/2008 version of 
Diskpart, an earlier version of Diskpart is supplied in the 2003 Resource kit with a reduced set of 
options. 
Syntax 
DISKPART 
 “Divide et impera” ~ Latin saying (Divide and conquer)
DOSKEY.exe 
Recall and edit commands at the DOS prompt, and create macros. You cannot run a Doskey 
macro from a batch file. 
Syntax 
DOSKEY [options] [macroname=[text]] 
Key 
macroname : A short name for the macro. 
text : The commands you want to recall. 
options : for working with macros... 
/MACROFILE=filename Specify a file of macros to install 
/MACROS Display all Doskey macros 
/EXENAME=exename Specify an executable other than cmd.exe 
/MACROS:exename Display all Doskey macros for the given 
executable 
/MACROS:ALL Display all Doskey macros for all executables 
ALT+F10 Clear macro definitions 
options : for working with the Command Buffer... 
/HISTORY : Display all commands stored in memory. 
/LISTSIZE=size : Limit the number of commands remembered by the 
buffer. 
/REINSTALL : Install a new copy of Doskey (clears the 
buffer). 
In normal use the command line is always in overwrite mode, DOSKEY 
can be used to 

change this to Insert, the insert key will always toggle from one to 
the other 
/INSERT : By default new text you type at the command line 
will be inserted in old text 
/OVERSTRIKE : By default new text you type at the command line 
will overwrite old 
In addition to the above, DOSKEY is loaded into memory for every cmd session so you can 
use 
Keyboard shortcuts
 at the command line
The size of the command history can be set from Control Panel, Console or from the properties 
of any cmd shortcut. Clear all history with DOSKEY /REINSTALL 

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