Which command will direct both standard output and standard error to the file Dirlist?

Which command will direct both standard output and standard error to the file Dirlist?

ls 2>&1 > dirlist will only direct standard output to dirlist. This can be a useful option for programmers. The first command that nancy executes is correct (eventhough no errors are generated and thus the file to which standard error is redirected is empty).

What is standard output and standard error?

Your screen is the standard output, sometimes denoted as stdout . By default, commands take input from the standard input and send the results to standard output. Standard error, sometimes denoted as stderr, is where error messages go. You can use a file as input and write results of a command to a file.

How do you redirect standard error to standard output?

To redirect stderr as well, you have a few choices:

1. Redirect stdout to one file and stderr to another file: command > out 2>error.
2. Redirect stdout to a file ( >out ), and then redirect stderr to stdout ( 2>&1 ): command >out 2>&1.

How to redirect console output to standard error?

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. This selects the second output stream that is STDERR.

Where does standard output and standard error go?

All the content printed to the standard output channel will be in the out.txt file, and all the content printed to the standard error channel will be in the err.txt file. In the above example, the files names out.txt and err.txt were totally arbitrary. You can use any names there.

How to redirect output from stderr to stdout?

You can print the errors and standard output to a single file by using the &1 command to redirect the output for STDERR to STDOUT and then sending the output from STDOUT to a file:

How to print standard output, standard error and command line redirection?

If the user wants to see only the regular output, they can redirect the error channel to a file and examine it later, separately. How to print error messages? In Perl, when a perl program starts, these two output channels are represented by two symbols: STDOUT represents the Standard Output, and STDERR represents the Standard Error.