Shulou(Shulou.com)06/03 Report--

In this issue, the editor will bring you about the commonly used batch DOS commands. The article is rich in content and analyzes and describes for you from a professional point of view. I hope you can get something after reading this article.

1. Display information: echo

Before learning the echo command, let's create a new folder bat under disk C and an empty bat file. For example, I am mybat.bat. All right, next.

Let's start with Chapter 1, Section 1.1 of the getting started Manual for batch processing.

one. Output prompt information

Format: echo the information you want to output

Example 1

Echo hello,worldecho i will come backpause

Perform the display:

C:\ bat > echo hello,world

Hello,world

C:\ bat > echo i will come back

I will come back

C:\ bat > pause

Please press any key to continue. . .

Can we write a batch so that it doesn't show what commands we wrote? OK! Then let's learn the second use of echo!

two. Turn off the echo of the command

Format: @ in front of the command

Example 2

@ echo hello,world@echo i will come backpause

Perform the display:

Hello,world

I will come back

C:\ bat > pause

Please press any key to continue. . .

three. Turn echo on or off

Format: echo [{on | off}]

To explain, if you add echo off before the batch command, the echo of the command in the batch will be turned off. Of course, if you don't want to show echo off,

For the command itself, you can add @ in front of echo off.

Example 3

@ echo offecho hello,worldecho i will come backpause

Perform the display:

Hello,world

I will come back

Please press any key to continue. . .

Adding @ echo off before the batch will make all commands no longer display the command itself, including the echo off command itself.

Yes.

four. Output a blank line, which is equivalent to entering an enter

Format: echo.

Pay attention to the "." in the command Follow the ECHO closely with no spaces in the middle, otherwise. Will be output to the screen as a prompt. Besides, "." Sure

Replace with any of these symbols,:; "/] +\.

Example 4

@ echo offecho I'm writing a batch tutorial! Echo.echo, do you see an empty line on it? Pause

Perform the display:

I'm writing a batch tutorial!

Do you see an empty line on it?

Please press any key to continue. . .

The return of the output of the command ECHO. Can be used as input to other commands through the DOS pipeline, such as echo. | time is equivalent to giving after the execution of the TIME command

Give me a return. So when executing, the system automatically returns to the DOS prompt state after the current time is displayed.

five. Reply to the questions in the order

Format: ECHO reply | Command expression

Function: through the pipeline command | transmit "reply" as input to the following "command expression", and as the input of "command expression". (note

Meaning, input method of pipeline command |, shift key\)

Example 5

@ echo offrd / s c:\ abcpause

Perform the display:

C:\ abc, do you want to confirm (Y _ hand N)?

To explain, abc is a folder that is not empty. When you delete it with the rd command, it will ask you for Y or N, and then you have to type Y _ N manually.

OK, let's change the batch office, and the system will automatically help us confirm the Y input.

Example 6

@ echo offecho Y | rd / s c:\ abcpause

six. Create a new file or add file content

Format: echo file content > file name

Example 7

@ echo offecho 123 > myfile.txtpause

So we create a myfile.txt file in the current directory with a content of 123. If you want to create an empty new file, you

You can try this.

Example 8

@ echo offecho. > myfile.txt pause

Note: the pause in all the above examples is a pause command, which is mainly used to pause the demonstration for everyone to see, !

2. Comment sentence: rem

Rem is a comment command, which is generally used to annotate the program. The content after the command is not executed, but can be echoed.

Example 1

@ echo offecho this is example 1! The echo statement above rem is used to display prompts. Pause

In addition:: can also play the role of rem annotation, and more concise and effective; but there are two points to note!

First, any character line that begins with a colon is treated as a label in the batch and everything that follows is directly ignored.

Valid label: the colon is followed by an alphanumeric string that can be recognized by the goto statement.

Invalid label: a special symbol followed by a non-alphanumeric symbol that is not recognized by goto and can be used as a comment

Function, so:: is often used as an annotation symbol, in fact: can also play the role of annotation.

Example 2

@ echo offecho this is example 2! The echo statement above is used to display prompts. Pause

Second, unlike rem, the character line after:: will not be echoed when executed, regardless of whether the command line echo state is opened with echo on or not

Because the command interpreter does not think it is a valid command line, at this point, rem in some cases

Will be more applicable than::; in addition, rem can be used in config.sys files.

3. Directory switching: cd

one. Switching of the same partition

Directory switching format: format: CD [drive letter] [path]

If the current directory is C:\ Documents and Settings\ mzybar, we want to change to a different directory under the same partition, see the following example. (

Note: the > in the following example indicates the prompt under the command line, and the previous one represents the current directory.)

Example 1

Change to the C:\ WINDOWS directory

C:\ Documents and Settings\ mzybar > cd C:\ WINDOWSC:\ WINDOWS >

Example 2

Change to the C:\ WINDOWS\ system32 directory

C:\ Documents and Settings\ mzybar > cd C:\ WINDOWS\ system32C:\ WINDOWS\ system32 >

If the current directory is C:\ WINDOWS\ system32, we want to return to the previous directory, that is, when we return to C:\ WINDOWS, we can do this:

Example 3

C:\ WINDOWS\ system32 > cd..C:\ WINDOWS >

Here, cd... Isn't it a lot easier? He he! Of course, you can also cd C:\ WINDOWS

If the current directory is C:\ WINDOWS\ system32, we want to return to the root directory, that is, when you return to C:\, you can try this:

Example 4

C:\ WINDOWS\ system32 > cd\ C:\ >

When we return to the root directory here, we use the cd\ command, and of course you can also cd c:\

In fact, in the DOS command. And\ both represent relative paths. It is the current directory. Is the upper level directory, and\ represents the root directory. Let's try it.

Cd.

Example 5

C:\ WINDOWS\ system32 > cd.C:\ WINDOWS\ system32 >

See, when typing cd. After that, it is still in the same position, because. It is the current directory, so of course there is no change to the current directory.

two. Switching between different partitions

Format: format: CD / d [drive letter] [path]

If the current directory is C:\ Documents and Settings\ mzybar, we need to switch to another partition directory, please see:

Example 1

Switch to D:\ 123\ abc

C:\ Documents and Settings\ mzybar > cd / d:\ 123\ abcD:\ 123\ abc >

If we want to switch to the root directory of disk D, there is an easier way to do this, see:

Example 2

C:\ Documents and Settings\ mzybar >

D:

D:\ >

Here, we can change to its root directory by typing the drive letter colon directly.

three. Another use of CD: to display the current full path, usually referenced through% cd%.

Example 1

@ echo offecho the current path is% cd%pause

The execution shows the current full path.

4. Column file name: dir

Displays a list of files and subdirectories in the directory.

DIR [drive:] [path] [filename] [/ A [[:] attributes]] [/ B] [/ C] [/ D] [/ L] [/ N]

[/ O [[:] sortorder]] [/ P] [/ Q] [/ S] [/ T [[:] timefield]] [/ W] [/ X] [/ 4]

[drive:] [path] [filename] specifies the drives, directories, and / or files to list.

/ A displays the file with the specified properties.

Attributes D directory R read-only files

H hide files A files ready to be archived

S system file-prefix for "no"

/ B uses an empty format (no title information or summary).

/ C displays the thousand delimiter in the file size. This is the default value. Use /-C to

Deactivate delimiter display.

/ D is the same as the wide type, but the files are listed by column.

/ L is in lowercase.

/ N the new long list format, with the file name on the far right.

/ O lists files in classified order.

Sortorder N by name (alphabetical order) S by size (from smallest to largest)

E by extension (alphabetical order) D by date / time (from first to last)

Group G directory priority-reverse prefix

/ P pauses after each information screen.

/ Q displays the file owner.

/ S displays files in the specified directory and all subdirectories.

/ T controls the time character fields displayed or used for classification.

Timefield C creation time

A Last visit time

W time of last write

/ W is in a wide list format.

/ X displays the short name generated as a non-8dot3 file name. The format is / N format

The short name is inserted before the long name. If there is no short name, in its position

Show blank.

/ 4 display the year in four digits

There are many dir commands. I feel dizzy when I see a lot of parameters above. Hehe ~ here we learn some commonly used OK ~

one. List the directories and files under c:\ windows

Format: DIR [drive:] [path] [filename]

Example 1

Dir c:\ windows

This approach has obvious disadvantages-it cannot be fully displayed when there are too many directories and files in the list, and we will solve this problem with the / p parameter.

/ P pauses after each information screen.

Example 2

Dir / p c:\ windows

We add a parameter "/ p" (that is, the abbreviation of "page" page) at the end of the command, and the column file will be displayed in paging, that is, listing the contents of a screen.

After recording the file, prompt "press any key to continue." after pressing any key, the next screen will be displayed. So you can view it screen by screen!

/ B uses an empty format (no title information or summary).

Example 3

Dir / b c:\

When we look at it, we find that the listed files have date, time, creator and other information. We can add the / b parameter to the command to make it list only the text.

The name of the piece.

two. List the files with the specified attributes under c:\

Format: DIR / a: attributes (here the: sign can be omitted)

Attributes D directory R read-only files

H hide files A files ready to be archived

S system file-prefix for "no"

Example 1

Dir / a c:\

List all the files under C:\.

Example 2

Dir / ah c:\

Lists implicit files (including files and folders).

Example 3

Dir / ad c:\

List all folders under C:\.

Example 4

Dir / ad-h c:\

List all folders under C:\, but do not contain implicit folders.

three. List the files under c:\ by category

Format: DIR / o: sortorder (here the: sign can be omitted)

Sortorder N by name (alphabetical order) S by size (from smallest to largest)

E by extension (alphabetical order) D by date / time (from first to last)

Group G directory priority-reverse prefix

Example 1

Dir / on c:\

/ o: the sort method parameter specifies the sort method when the dir command displays the command results. Setting the sort method to "n" means to sort according to the alphabetical order of the file names.

(from Aqiz, and so on).

Example 2

Dir / ogn c:\

Folders are listed first, and folders and files are arranged alphabetically.

Both ★ "/ o" and "/ a" can omit the colon ":", but there is no space between them. For example, the shape after the omission of "/ opurn"

Type should be "/ on".

These are the commonly used batch DOS commands that the editor shares with you. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.