I have a file .bat and there is the command:
chcp 65001
That results in CMD output:
Página de código ativa: 65001
But I want this message, displayed after the command is executed, to be hidden to the user. What is the CMD command that does this?
NOTE: I use Windows 8.
There are 3 things to do:
@echo off
Hides the commands entered by the user, otherwise it also hides the current folder that is navigating via command. Note that @ is used to hide the response of the echo off command.
With echo on (default):
echo Oi!
pause
Display something like (note a space appears before the first line):
C: \ Users \ User \ Desktop> echo Hi! Hi!
C: \ Users \ User \ Desktop> Pause
Press any key to continue. . .
See that both responses when commands are displayed
With echo off without @:
echo off
echo Oi!
pause
Display something like (note a space appears before the first line):
C: \ Users \ User \ Desktop> echo off
Hi! Press any key to continue. . .
See that both responses when commands are displayed
With echo off com @:
@echo off
echo "Oi"
pause
Displays something like (note that does not appear a space before the first line):
Hi! Press any key to continue. . .
>nul
nul is an object that discards any written data, > is the signal to point to where the output data should be written instead of displaying on the screen, note that for each new command you must add one new >nul , for example:
@echo off
echo Foo >nul
echo Baz
echo Bar
pause
The answer will be:
Baz
Bar
Press any key to continue. . .
If you do this:
@echo off
echo Foo >nul
echo Baz >nul
echo Bar >nul
pause
The answer will be:
Press any key to continue. . .
And with >nul in the command pause you will not have any answer:
@echo off
echo Foo >nul
echo Baz >nul
echo Bar >nul
pause >nul
2>&1
0 is the stdin , is the input, that is what is sent to the commands, for example commands typed by the user, or commands in a .bat or .sh script 1 is the stdout , ie the output, or output 2 is the stderr , error output, when a fault occurs
In case we do not need 0 because echo off already hides input data, then we use 2 to direct the output to 1, so for example, if you do this:
@echo off
cd DiretorioInexistente >nul
pause >nul
It will appear something like:
The system can not find the path specified.
But if you do this it will not display anything:
@echo off
cd DiretorioInexistente >nul 2>&1
pause >nul
If you want to hide everything but the errors (I think it's preferable), use this:
@echo off
meucomando argumento1 argumento2 >nul
If you want to hide everything, use this:
@echo off
meucomando argumento1 argumento2 >nul 2>&1
I do not have much knowledge, if I have a failure to comment or anything.
So the final code looks like this:
@echo off
chcp 65001 >nul 2>&1
echo Olá
pause
Note:
When using chcp , a message like this may appear:
The system can not write to the specified device.
To "fix", you will have to click on the title bar > Properties > Font > Select the font Lucida Console