How do you redirect both standard output and standard error to the same location in shell script?

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To redirect standard output and standard error to the same file, use the following command syntax. Specifically, append 2>&1 to the end of your usual command. A slightly easier way to achieve this functionality is with the &> operator.

What is the correct syntax to redirect both standard output and standard error into the same file both?

2 Answers

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

How do you redirect output and error to a file?

The syntax is as follows to redirect output (stdout) as follows:

command-name > output.txt command-name > stdout.txt.
command-name 2> errors.txt command-name 2> stderr.txt.
command1 > out.txt 2> err.txt command2 -f -z -y > out.txt 2> err.txt.
command1 > everything.txt 2>&1 command1 -arg > everything.txt 2>&1.

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

To redirect both stdout and stderr to the same file, use 2>&1. directs only the standard output to file dirlist, because the standard error made a copy of the standard output before the standard output was redirected to dirlist.

How would you redirect only the standard error output of the Is command to the null device?

In Unix, how do I redirect error messages to /dev/null? You can send output to /dev/null, by using command >/dev/null syntax. However, this will not work when command will use the standard error (FD # 2). So you need to modify >/dev/null as follows to redirect both output and errors to /dev/null.

How would you redirect both stdout and stderr of any command to a file name output txt?

9 Answers

>>file. txt : Open file. txt in append mode and redirect stdout there.
2>&1 : Redirect stderr to “where stdout is currently going”. In this case, that is a file opened in append mode. In other words, the &1 reuses the file descriptor which stdout currently uses.

Which symbol is used to redirect the error output to the standard output?

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.

What is used to redirect the standard error?

Redirecting Standard Error and Other Output Generally, when a command starts, three files are already open: stdin (standard input), stdout (standard output), and stderr (standard error). If you want to redirect standard input or standard output, you can use the <, >, or > > symbols.

What is the proper way to redirect the output of the ls command to a file named LS txt?

The command ls *. txt will be run, then redirect the result to STDOUT. This result, rm -f *. txt will be now executed because of the backquotes.