How do you redirect standard error to standard output?
How do you redirect standard error to standard output?
Understanding the concept of redirections and file descriptors is very important when working on the command line. To redirect stderr and stdout , use the 2>&1 or &> constructs.
How do you redirect standard error and standard output to a file in Unix?
2> is input redirection symbol and syntax is:
- To redirect stderr (standard error) to a file: command 2> errors.txt.
- Let us redirect both stderr and stdout (standard output): command &> output.txt.
- Finally, we can redirect stdout to a file named myoutput.txt, and then redirect stderr to stdout using 2>&1 (errors.txt):
How redirect standard output in Linux?
Redirecting stdout and stderr to a file: The I/O streams can be redirected by putting the n> operator in use, where n is the file descriptor number. For redirecting stdout, we use “1>” and for stderr, “2>” is added as an operator. We have created a file named “sample.
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.
What is standard input output redirection in Linux?
Input/Output (I/O) redirection in Linux refers to the ability of the Linux operating system that allows us to change the standard input ( stdin ) and standard output ( stdout ) when executing a command on the terminal. By default, the standard input device is your keyboard and the standard output device is your screen.
Which command will redirect standard error to ls output txt?
Redirecting both Standard Output & Standard Error
- ls /usr/bin is the command run.
- > command.txt redirects the output of the ls command.
- 2>&1 sends the output of the file descriptor 2, stderr , to the same location as the file descriptor 1, stdout.