Bat command Introduction

1. Introduction to simple batch processing internal commands
1. Echo command
Enable or disable the request echo function or display messages. If no parameters exist, the echo command displays the current echo settings.
Syntax
Echo [{ON │ off}] [Message]
Sample: @ echo off/ECHO Hello World
In actual application, we will combine this command with the redirection symbol (also known as the pipeline symbol) to input some commands to a file in a specific format. this will be reflected in future examples.

2. @ command
The command after @ is not displayed. In the intrusion process (for example, you can use batch processing to format the enemy's hard disk), the other party cannot see the command you are using.
Sample: @ echo off
@ ECHO now initializing the program, please wait a Minite...
@ Format X:/Q/u/AutoSet (the/y parameter cannot be used for the format command. Fortunately, Microsoft has reserved the AutoSet parameter for us, the effect is the same as that of/Y .)

3. Goto command
Specify to jump to the tag. After the tag is found, the program processes the commands starting from the next line.
Syntax: goto label (label is a parameter that specifies the rows in the batch processing program to be switched .)
Sample:
If {% 1 }={} goto noparms
If {% 2 }={} goto noparms (if you do not understand the IF, % 1, and % 2 here, skip the step first, which will be explained in detail later .)
@ REM check parameters if null show usage
: Noparms
Echo usage: monitor. Bat serverip portnumber
Goto end
The name of a tag can start at will, but it is better to have a meaningful letter. Add a letter before it to indicate that the letter is a tag. The Goto command is based on this: to find the next step and jump to it. It is better to have some explanations so that others seem to understand your intention.

4. Rem command
The annotation command is equivalent to/* -------- */in the C language. It is not executed, but serves as a comment for others to read and modify.
Rem message
Sample: @ REM here is the description.

5. Pause command
When running the pause command, the following message is displayed:
Press any key to continue...
Sample:
@ Echo off
: Begin
Copy A: *. * D: "back
Echo please put a new disk into driver
Pause
Goto begin
In this example, all files on drive a's disk are copied to drive D: "back. When the displayed note prompts you to put another disk into drive a, the pause command will suspend the program so that you can change the disk and press any key to continue processing.

6. Call Command
Call another batch processing program from one batch processing program without terminating the parent batch processing program. The Call Command accepts the labels used as the call target. If a call is used outside a script or batch file, it does not work in the command line.
Syntax
Call [[drive:] [path] filename [batchparameters] [: Label [arguments]
Parameters
[Drive:} [path] filename
Specifies the location and name of the batch processing program to be called. The filename parameter must have the. bat or. CMD extension.