Which is used to redirect both stdout and stderr?

When saving the program’s output to a file, it is quite common to redirect stderr to stdout so that you can have everything in a single file. > file redirect the stdout to file , and 2>&1 redirect the stderr to the current location of stdout .

When working in the bash shell you need to redirect both stdout and stderr Which of the following commands will redirect both stdout and stderr?

Conclusion

How to redirect both stdout and stderr to a file?

Please use command 2>file Here 2 stands for file descriptor of stderr. You can also use 1 instead of 2 so that stdout gets redirected to the ‘file’ Not the answer you’re looking for?

How to redirect errors from stderr to Nul?

To redirect (only) the error message to NUL, use the following command: Or, you can redirect the output to one place, and the errors to another. 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 does grep redirect stdout to stderr in Bash?

stdout goes to stdout, stderr goes to stderr. grep only sees stdout, hence stderr prints to the terminal. After writing to both stdout and stderr, 2>&1 redirects stderr back to stdout and grep sees both strings on stdin, thus filters out both. You can read more about redirection here. This was introduced in Bash 4.0, see the release notes.

Where does the error message go when redirecting to stdout?

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.