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How do I redirect output and error of command line to a file?
The regular output is sent to Standard Out (STDOUT) and the error messages are sent to Standard Error (STDERR). When you redirect console output using the “>” symbol, you are only redirecting STDOUT. In order to redirect STDERR you have to specify ‘2>’ for the redirection symbol.
Which operator should you use to redirect the output of a command to a file?
Regular output append >> operator This allows you to redirect the output from multiple commands to a single file.
How do I redirect the output of a batch file?
Some “best practices” when using redirection in batch files:
- Use >filename.
- Use >logfile.
- Use >CON to send text to the screen, no matter what, even if the batch file’s output is redirected.
- Use 1>&2 to send text to Standard Error.
- It’s ok to use spaces in redirection commands.
Is there a way to redirect a command to a file?
However, there are a few different ways you can redirect command line writes to a file. The option you choose depends on how you want to view your command output. When you type a command in the Windows console ( command prompt ), the output from that command goes to two separate streams.
Is there a way to output stdout to a file?
To do this, open the command prompt and type: The > character tells the console to output STDOUT to the file with the name you’ve provided. When you run this command, you’ll notice that there isn’t any response in the command window except the error that the file doesn’t exist.
How to view output from the command line?
You can view the standard output that went to the file by typing “myoutput.txt” in the command window. This will open the text file in your default text file viewer. For most people, this is usually Notepad.exe.
What is the standard response for the DIR command?
For example the standard response for the DIR command is a list of files inside a directory. STDERR: Standard Error is where any error messages go if there’s a problem with the command. For example if there aren’t any files in the directory, the DIR command will output “File Not Found” to the Standard Error stream.