MS-DOS

You don't directly write programs on the command prompt, but you can use programs to run commands off the command prompt. They're called batch files (or command files .cmd) There are a few guides for proper syntax in batch files, as well as ways to use the many commands. A lot of them can be found by typing "help" into the command prompt.

Batch files are simple scripts that do easy tasks, such as opening files, copying directories, and deleting files. You can make menus on them and open selective files upon startup too.

They don't even need to be compiled. Just use a text editor (Notepad or

another program designed for scripting) and write the commands with correct syntax. It's simple and runs line-by-line. Save it as a file with a .bat file name extension, or as a .cmd extension. The files are written in Microsoft DOS format.

FAT16 (File Allocation Table 16 bit)

cacls

dir

Lists all files and directories in the directory that you are currently in.

dir /ad

List only the directories in the current directory. If you need to move into one of the directories listed use the CD command.

dir /s

Lists the files in the directory that you are in and all sub directories after that directory, if you are at root "C:\>" and type this command this will list to you every file and directory on the C: drive of the computer.

dir /p

If the directory has a lot of files and you cannot read all the files as they scroll by, you can use this command and it will display all files one page at a time.

dir /w

If you don't need the info on the date / time and other information on the files, you can use this command to list just the files and directories going horizontally, taking as little as space needed.

dir /s /w /p

This would list all the files and directories in the current directory and the sub directories after that, in wide format and one page at a time.

dir /on

List the files in alphabetical order by the names of the files.

dir /o-n

List the files in reverse alphabetical order by the names of the files.

dir \ /s |find "i" |more

A nice command to list all directories on the hard drive, one screen page at a time, and see the number of files in each directory and the amount of space each occupies.

dir > myfile.txt

Takes the output of dir and re-routes it to the file myfile.txt instead of outputting it to the screen.

we may use << ( redirection) operator it will append the data of file........

dos environment has importance because it provides a set of cammands that enable the users to interface to acess or manipulate information on their disk, as well as simly interact with their computer.

the characteristics are

1-it is very easy to use

2-it has single user operating system

3-it works only in micro computer

4-ut supports batch processing system

5-it supports verity of software

6-provides commands line interface to the user

7-some important terms associated with some importance.

ls (ie lower case LS)

In DOS: dir

If there are many files in the directory, type, "dir/p/o" ...this will stop the listing when the page fills up and list them in alphabetical order... press any key to continue to the next page of listed files.

If you're only interested in the name of the files (not the date/size etc.) you can add /B

cli ,mdi,gui

Nothing replaced it, MS-DOS is a command line interface Operating System, it is still used by Windows Operating Systems to this date, but access to it by the user has been severely limited if not completely blocked, to protect the computer from severe user error at the command line level.

Netbooks

DOS computers are no longer sold on the mainstream market. Dell sells some barebones computers bundled with FreeDOS, due to licensing restrictions, but most of the hardware would be unusable in DOS.

Quite frankly, you can probably buy an old, used computer with the hardware to run most DOS programs for about 10 bucks. Any Pentium II or Pentium III with an ISA slot (for a SoundBlaster card) should be good enough to run most applications that are not timing-dependent. On a commercial scale, you would almost certainly want to get a contract with an embedded systems design company to build "new" DOS computers.

To remove your profile from Zoosk, please deactivate your account. Click on "settings" on Zoosk, and then click on "Account". Finally, scroll to the bottom of the page and click on the link that says "Deactivate your Zoosk account".

Internal DOS commands are those provided internally by cmd.exe:

BREAK, CD/CHDIR, CHCP, CLS, COPY, CTTY, DATE, DEL/ERASE, DIR, EXIT, LOADHIGH, LOCK, MD/MKDIR, PATH, PROMPT, RD/RMDIR, SET, TIME, TRUENAME, TYPE, UNLOCK, VER, VOL, VERIFY.

External commands are those provided by separate executables.

A single-user operating system is a type of operating system (OS) that is developed and intended for use on a computer or similar machine that will only have a single user at any given time. This is the most common type of OS used on a home computer, as well as on computers in offices and other work environments. There are two general types of single-user operating system: single task and multitasking systems. Though a single-user operating system can be connected to other systems through a network, it is still truly only used by a single person and is different than a multi-user OS. A single-user operating system that is a single task system is developed for use with a computer or electronic device that will only run one application at a time. This type of OS is typically used on devices such as wireless phones and two-way messaging devices. A single task, single-user operating system can only run one program or application at a time, and so is not as useful for a computer or other device intended to run multiple programs at once.

If you use the Windows OS check out this link from Microsoft.

http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/telnet_commands.mspx?mfr=true

Telnet: TELNET (TELetype NETwork) is a network protocol used on the Internet or local area network (LAN) connections. It was developed in 1969 and standardized as IETF STD 8, one of the first Internet standards.

Follow some step:-

Step # 1: First, open a command prompt. To open a command prompt window, click Start, Run and then type in cmd and press Enter. You can also press the +R to open the Run prompt and then type in cmd in the open text box.

Step # 2: You need to know a remote mail server. If you are still in school or working, there is the excellent opportunity to use your University mail server or your company's mail server for this.

type in telnet RemoteMailServer 25 at the command prompt. The Remote mail server here in this command is the mail server of your school or company. It is usually mailhost..edu or compmail..com or something on those lines. When you press enter, you are shown a quick prompt that you are connecting to the remote mail server.

Step # 3: Introduce yourself to the mail server. Play around a bit.

type in helo mailhost at the command prompt. The mail server responds back with something like this

250 RemoteMailHost. Hello , pleased to meet you.

Step # 4: You can now enter your email address.

type in mail from: your email id @ blah.com

The mail server responds back with a 250 … sender ok

Step # 5: You can now enter your receipient's email address

type in rcpt to: recipient email id @ blah.com

The mail server responds back with a "Recipient OK" message

Step # 6: Now, you are ready to type in the body of the email message.

type in data and press enter.

Now, type your message and then finally press Enter. To end your message type in a single period "." . Your message is now in the queue

Step # 7: To complete and finish the process, type in quit and press enter. The mail server responds with a "Bye" after which you see a "Connection to host lost" message displayed.

Not all but most DOS software can run on Windows 98..

sam file is located inside C:\ windows system 32 config folder ypu have to stop the file process by booting window with mini xp download hirenboot and burn it boot windows and install hiren boot (it is not an operating system its just like a layer over window ( no need to worry installing it) and then access sam file C:\ windows\system\32\config\sam open it on notepad

.BKF

By the common definition, no. It is a "disk operating" (basically any operating system booted from a disk), and it is made by Microsoft, but the similarities end there.

It is user abend.

To go back to the root (beginning) directory: cd\ To go to the directory above you: cd.. To go a directory below you: cd directoryname Of course, after you type the command, you have to hit the enter key.

The asterisk or is used a wildcard to represent any amount of characters. It can be used to represent all or part of something. When it comes to files, *.* represents files of any name and any extension. You can also use it where you have part of the name you want, like if you want to find names that begin with particular letters like this where it takes anything that starts with A and has any amount of letters after it:

A*