The ECHO command is a sub-command of DOS batch processing commands that everyone is familiar with. However, you may not know all of its functions and usage:
1. As a switch to control whether the batchcompute command displays the command line itself during execution
Format: ECHO [ON | OFF]
To disable the display of the "echo off" command line, add "@" before the command line.
2. display the current ECHO setting status
Format: ECHO
3. Output prompt information
Format: ECHO content
The preceding three methods are common for ECHO commands. They are also common and useful. However, you should also be familiar with the following techniques as the doscommand gold taozer:
4. Close the doscommand prompt
In the DOS prompt state, type echo off to close the display of the DOS prompt so that only the cursor is left ON the screen until echo on is typed.
5. Empty output line, which is equivalent to entering a carriage return
Format: ECHO.
It is worth noting that "." In the command line must be followed by no space in the middle of the ECHO, otherwise "." will be output to the screen as a prompt. In addition, "." can be replaced by any symbol, such as,:; "/[\] +.
In the following example, the ECHO. Output carriage return is switched to the input as the TIME command through the DOS pipeline, which is equivalent to a carriage return after the TIME command is executed. Therefore, the system will automatically return to the DOS prompt status after the current time is displayed during execution:
C:> ECHO. | TIME
The ECHO command output is another example of an empty line application: Add ECHO. To the automatic batch processing file so that the prompt screen originally displayed at the bottom of the screen appears at the top of the screen.
6. answer questions in the command
Format: ECHO Reply | command file name
The preceding FORMAT can be used to simplify commands that require human-machine interaction (for example, CHKDSK/F; FORMAT Drive:; del *. *). It uses the DOS pipeline command to use the preset reply language output by the ECHO command as the input of the man-machine conversation command. The following example is equivalent to entering "Y" and press Enter when a man-machine conversation occurs in the called command:
C:> echo y | CHKDSK/F
C:> echo y | del :*.*
7. Create a new file or add File Content
Format: ECHO file content> file name
ECHO file content> file name
For example, C:> ECHO @ echo off> AUTOEXEC. BAT creates an automatic batch file.
C:> echo c: \ CPAV \ BOOTSAFE> AUTOEXEC. BAT Append content to the automatic batch file
C: type autoexec. BAT: displays the automatic batch processing file
@ ECHO OFF
C: \ CPAV \ BOOTSAFE
8. Print content or control code to the printer
Format: ECHO printer control code> PRN
ECHO print content> PRN
The following example is to input a print control code to the M-1724 printer. <Alt> 156 press and hold the Alt key to type 156 on the keypad. in similar cases, follow these steps:
C:> ECHO <Alt> + 156 <Alt> + 42 <Alt> + 116> PRN (enter the underline command FS * t)
C:> ECHO <Alt> + 155 @> PRN (enter the initialization command ESC @)
C:> ECHO.> PRN (line feed)
9. Sound the horn
C:> ECHO ^ G
"^ G" is input using Ctrl + G or Alt + 007. Multiple ^ G inputs can generate multiple audible sounds. You can directly add it to a batch file or call it as a batch file.
10. Execute the ESC control sequence to modify screen and keyboard settings
We know that the DOS Device Driver ANSI. SYS provides a set of ESC control sequences used to modify screen and keyboard settings. If you execute the following batch processing program, you can define the function key F12 as the DOS command "DIR/W" and change the screen color to the blue background of the white character.
@ ECHO "values [0; 134;" DIR/W "; 13 p
@ ECHO "response [1; 37; 44 m
(Note: In the batch processing file, the "marker" character is entered by pressing 27 on the Alt keypad in the editing status)
The doscommand is the first thing people need to learn from computers. It is too easy for many people to be familiar with it. Otherwise, there is a wealth of content in these commands, it remains to be further understood and developed. If you are a kind of person, you will surely find new bright spots from these self-known commands, so that you can get real money.
