Google Search

DOS Lesson 1

1. Dir (Directory)
-This command is used to view a list of all files and folder in the current location.
Syntax: dir
Also we can use dir command with extension according to our use
Dir/p (used to view in page wise format)
Dir/a (used to view files according to its attribute such as H for hidden, S for system and R for read only.)
Also we can search for files according to name and type.
Syntax: dir N*.* (This will only show file names starting with the letter N.
Syntax: dir *.jpg (This will only show jpg files)

2. Cd (Change Directory)
-used to open or close folders in dos.
Syntax: cd folder name
Example: cd windows (this will open windows folder)
Syntax: cd.. (Used to close single folder)
Syntax: cd/ (used to close all folders at once)

3. Md (Make Directory)
-Used to create new folders form dos.
Syntax: md folder name
Example: md city (this will create a folder named city)
Example: md city country college students (this will create 4 folders at once)

4. Rd (Remove Directory)
-Used to delete folders.
Syntax: rd folder name (This will delete any empty folder)
Syntax: rd folder name /s (but to delete a folder with files inside we need to use /s extension)

5. Copy con
-used to create new text files in dos. It cannot be used to edit.
Syntax: copy con filename.txt
Example: copy con city.txt
-then type the all required information.
-To save press F6 and enter.

6. Edit command
-used to create or edit text files.
Syntax: edit filename.txt
(Then type all required information. Then to save click on file>save>exit.)

7. Del
-used to delete files from DOS
Syntax: del filename

8. type
-Used to view text files from dos.
Syntax: type files name.txt
9. cls command
-used to clear screen.

10. Changing drive in dos
-to go from one drive to another type the drive letter followed by a:
Syntax: D: (this will change dos prompt to d drive.)

11. Time : used to change system time

12. Date : used to view or change system date.

DOS Lesson 2

13. Copy
-used to copy paste files from one location to another.
Syntax: copy filename location
Example: copy city.txt d:\town
(This will copy files to town folder in d drive)

14. Move
-Used to cut paste files form one location to another.
Syntax: move filename location
Example: move city.txt e:\student
(this will cut and paste files to student folder in E: drive

15. Format
-Used to format drives from dos.
Syntax: format dirve filesystem
Example: format d: /FS:NTFS
Example: format d: /FS:FAT 32

16. Convert
-Used to convert fat file system
Example: convert D: /FS:NTFS

17. Attrib
-Used to modify file attributes.
H(Hidden), R (Read only), S(System)
(+) means enable
(-) means disable
Example: attrib +h filename (this will make file hidden)
Attrib -h file name (This will make unhide file)

18. Color
-Used to change foreground and background color of DOS.
Example: color 1
Example : color 1A
To view help for color codes use color /?
Example: color /?

19. Ren
-Used to rename files.
Syntax: ren oldname newname
Example:ren city.txt town.txt

20. Chkdsk
-Used t oscan drives for errors.
Example Chkds C:

21. Defrag
-Used to defragment drives from dos.
Example: defrage d:

22. net user command
-Used to creat users from dos.
Syntax: net user username /add (this is used to creat a windows user)
Syntax: net user username password /delete (this is used to delete windows user)

23. Help
-Used to view a list of basic command that can be used in DOS.

24. /?
-Used to get help for specific commands.
Example: dir/? (used to get help for dos)

25. Exit
-Used to close DOS.

DOS command Lesson 2

13. Copy
-used to copy paste files from one location to another.
Syntax: copy filename location
Example: copy city.txt d:\town
(This will copy files to town folder in d drive)

14. Move
-Used to cut paste files form one location to another.
Syntax: move filename location
Example: move city.txt e:\student
(this will cut and paste files to student folder in E: drive

15. Format
-Used to format drives from dos.
Syntax: format dirve filesystem
Example: format d: /FS:NTFS
Example: format d: /FS:FAT 32

16. Convert
-Used to convert fat file system
Example: convert D: /FS:NTFS

17. Attrib
-Used to modify file attributes.
H(Hidden), R (Read only), S(System)
(+) means enable
(-) means disable
Example: attrib +h filename (this will make file hidden)
Attrib -h file name (This will make unhide file)

18. Color
-Used to change foreground and background color of DOS.
Example: color 1
Example : color 1A
To view help for color codes use color /?
Example: color /?

19. Ren
-Used to rename files.
Syntax: ren oldname newname
Example:ren city.txt town.txt

20. Chkdsk
-Used t oscan drives for errors.
Example Chkds C:

21. Defrag
-Used to defragment drives from dos.
Example: defrage d:

22. net user command
-Used to creat users from dos.
Syntax: net user username /add (this is used to creat a windows user)
Syntax: net user username password /delete (this is used to delete windows user)

23. Help
-Used to view a list of basic command that can be used in DOS.

24. /?
-Used to get help for specific commands.
Example: dir/? (used to get help for dos)

25. Exit
-Used to close DOS.

Types of RAM

1. EDO RAM (Extended Data Out)
-This comes in capacity of 8MB and 16MB
-It runs at speed of 66 MHz
-It uses SIMM slots.

2. SDRAM (Synchronous Dynamic RAM)
-It comes in capacity of 16MB, 32MB, 64MB, 128MB and 256MB.
-It runs at a speed of 100,133,166 MHz

3. DDR-SDRAM (Double Data Rate) -It comes in 3 types
DDR1 –Capacity of 256MB, 512MB, and 1GB.
Speed of 200, 266, 300, up to 400 MHz

DDR2 –Capacity of 512MB, 1GB, 2GB, 4GB.
Speed of 400 up to 800 MHz

DDR3 –Capacity of 1GB, 2GB, 4GB, 8GB and 16GB.
Speed of 1GHz and higher.

4. VRAM/WRAM (Video RAM/Windows RAM)
-These are used to graphic memory in graphic cards.
-VRAM comes in capacity of 8, 16, 32 MB.
-WRAM comes in capacity of 32, 64, 128 and 256 MB.
-Latest graphic cards now are DDR2/DDR3 technology.

Types Of CPU

1) Pentium I - Speed 60 to 160 MHz,
Voltage Consume 5V to 3.3V,
Socket 4, Socket 5, Socket 7 (To recognize)

2) ) Pentium Pro Processor – Used because of Server Network.
Speed 150MHz to 200 MHz,
Voltage Consume 3.1V to 3.3V,
Socket 8 (To recognize)

3) Pentium II - Speed 233 MHz to 450 MHz,
Voltage Consume 3.3V,
Socket 1 (To recognize)

4) Pentium III - Speed 450 MHz to 1.26 GHz,
Voltage Consume 3.3V,
Socket 1, PGA370

5) Pentium IV - Speed 1.3 GHz to 3.2 GHz,
Voltage Consume 3.3V,
Socket PGA423, PGA478

Celeron Processor
1) Celeron (Pentium II Base) - Speed 266MHz to 700 MHz,
Voltage Consume 3.3V,
Socket 370 and Slot 1

2) Celeron (Pentium III Base) - Speed 533 MHz to 700 MHz,
Voltage Consume 3.3V,
Socket 370

3) Celeron (Pentium IV Base) - Speed 850MHz to 2.4 GHz,
Voltage Consume 3.3V,
Slot 1 & Socket 370

Xenon Processor (Used in Server Based Network)

1) Xenon (Pentium II Base) - Speed 400 MHz to 450 MHz,
Voltage Consume 3.3V,
Socket used is slot 2

2) Xenon (Pentium III Base) - Speed 500 MHz to 1 GHz,
Voltage Consume 3.3V,
Socket used is slot 2

3) Xenon (Pentium IV Base) - Speed 1.4 GHz to 3.06 GHz,
Voltage Consume 3.3V,
Socket used is socket 603

4) Xenon MP - Speed 1.4 GHz to 2 GHz,
Voltage Consume 3.3V,
Socket used is socket 603


Itanium Processor (Used in Server Based Network)
Speed 10 GHz to 20 GHz,
Voltage Consume 3.3V,
Socket used is socket 418 & 611

hit counters
website-hit-counters.com

Choose any

SEO

free web site traffic and promotion