harini infosys - Dos Commands

Operating Systems - MS-DOS - Commands

Command	Description
dir	lists the contents of a folder
cd	changes folder
cd ..	parent folder
md or mkdir	creates a new folder
deltree	deletes a folder and all sub-folders
copy, xcopy	copies a file
move	moves a file
del	deletes a file
type	displays the contents of a file
type |more	displays file contents page by page, pausing after each page
help	help for the given command
print	prints the given file
attrib (-/+r, -/+a, -/+s, -/+h)	changes a file's attributes (- deactivates, + activates, r: read-only, a: archive, s: system, h: hidden file)
format	formats the given drive
label	assigns a drive name to a drive
ver	gives the version number

operating system configuration

Operating system	Associated file system
DOS	FAT16
Windows XP	NTFS
Windows 98	FAT32
Windows 95	FAT16 - FAT32 (for version OSR2)
Windows NT	NTFS
OS/2	HPFS
Linux	Linux Ext2, Linux Ext3

harini infosys

Creating a start menu

In DOS, Windows 95 or Windows 98 systems it is possible to create a start menu where you can select which devices are to be loaded in DOS and even (as is the case with Windows 95/98) tell the system to start-up in either Windows or DOS. The config.sys and autoexec.bat files (and in Windows the msdos.sys file) must be modified to allow the selection of DOS and Windows at start-up. 

operating systems harini infosys

Operating Systems - Customizing DOS

Config.sys

The config.sys file is a text file which loads device drivers and defines parameters for MS-DOS.

·      device is used to load device drivers

·      device high loads the driver into the high memory area

·      dos defines the area of memory where DOS will be loaded

·      drivparm defines disk drive specifications

·      fcbs specifies the number of file control blocks

·      files specifies the number of files that can be opened at the same time

·      install runs a resident program (TSR - terminate and stay resident)

·      last drive defines the number of valid disk drives

·      shell indicates that another command prompt other than

·      COMMAND.COM should be used.

·      stacks specifies the amount of memory reserved for hardware interrupts 

means of operating system

  About O.S (Operating System):  

Operating System is the personality of microprocessor. The OS plays a pivotal role in all activities of the PC.  OS organized collection of software’s that controls the overall operations of the PC.

Descriptions of computer operating system

2. WORKING WITH OPERATING SYSTEM

Objectives: 

  

·        About Operating System (O.S)

·        Brief history of OS

·        Internal and External Commands

·        About Windows-95

·        About Windows XP Service Pack-2

system required components

System Components: -

            Component needed to assemble a basic modern PC system

1.      Motherboard

2.      Processor

3.      Memory

4.      Hard disk

5.      CD-ROM

6.      Floppy drive

7.      Keyboard

8.      Mouse

9.      Monitor

10.  Power supply

11.  Cabinet