Windows Bat (Batch): Basic syntax

Windows Bat (Batch)--basic syntax

1. @

If you have it at the beginning of the line, the command is not displayed.

2. Echo

2.1 echo [{On|off}] [message]

Output, Echo.

2.2 On | Off

It is actually a switch command, that is, it has only two states: open and close. So there's the echo on and echo off two commands.

(1) Echo off

Show only execution results

(2) echo on (default)

Show execution commands (except echo) and execution results

(3) > Output redirection

Create or empty a file, and then output the data to a file

echo Hi > A.txt

Append data to a file

Echo This is a text "A.txt

echo Hi > A.txt

Type A.txt

Echo This is a text "A.txt

Type A.txt

3. Notes

:: or REM

4. ":" and Goto

(1) Goto

Jump to Tag

(2):

Define a label

Sample:

[Python]

if {%1}=={} goto noparms

if {%2}=={} goto noparms (if,% 1,%2 if you do not understand it, skip it first and there will be a detailed explanation later.) )

@Rem check parameters if NULL show usage

: noparms

echo Usage:monitor.bat ServerIP portnumber

Goto END

5.Pause

When you run the Pause command, the following message is displayed:

[Python]

Press any key to continue ...

Sample:

[Python]

@echo off

: Begin

Echo Pause

Pause

Goto BEGIN

6.Call command

Another batch program is called from one batch program, and the parent batch program is not terminated. The call command accepts the label that is used as the calling target. If you use call outside of a script or batch file, it will not work at the command line.

Grammar

Call [Drive:][path] FileName [Batchparameters] [: Label [arguments]

Parameters

[Drive:} [Path] FileName

Specifies the location and name of the batch program to invoke. The filename parameter must have a. bat or. cmd extension.

7.start command

Calling an external program, all DOS commands and command-line programs can be called by the start command.

Common parameters of intrusion:

Min Start window minimized

Separate start 16-bit Windows programs in separate spaces

High starts the application in the high priority category

REALTIME starting the application in the REALTIME priority category

Wait to start the application and wait for it to end

Parameters these parameters for transmission to the command/program

The application that executes is a 32-bit GUI application when CMD. EXE returns a command prompt without waiting for the application to terminate. If executed within a command script, the new behavior does not occur.

8.choice command

Choice Use this command to let the user enter a character to run different commands. Use should be Plus/C: parameters, C: After the prompt should be written to enter the characters, no spaces between. It has a return code of 1234 ...

such as: Choice/c:dme defrag,mem,end

will display

Defrag,mem,end[d,m,e]?

Sample:

The contents of Sample.bat are as follows:

@echo off

Choice/c:dme Defrag,mem,end

if errorlevel 3 goto defrag (the highest number of error codes should be judged first)

if errorlevel 2 goto MEM

If Errotlevel 1 goto end

:d Efrag

C:dosdefrag

Goto END

: Mem

Mem

Goto END

: End

echo Good bye

When this file runs, Defrag,mem,end[d,m,e] is displayed? The user can select D m e, then the IF statement will be judged, D represents the execution of a program segment labeled Defrag, M represents the execution of a program segment labeled Mem, E represents the execution of a program segment labeled End, and each segment ends with a goto end to jump the program to the end label. Then the program will show good Bye, the end of the file.

9.%x Parameters

%1--1th parameter

%2--2nd parameter

%3--3rd parameter

...

NET use%1ipc$%3/u: "%2"

%1--IP

%2--username

%3--Password