What do you use to forward errors to a file?
To redirect stderr as well, you have a few choices: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.More items…•.
How do I redirect stderr to stdout?
To redirect stderr and stdout , use the 2>&1 or &> constructs.
How do you append stdout and stderr to a file?
1 AnswerEither use this construct: cmd >>file. txt 2>&1 where >> file appends the output to the file and 2>&1 redirects the stderr to stdout .Or use cmd &>>file ensuring that you have bash version >4 (using bash –version ) and #!/bin/bash at the beginning of file ( #!/bin/sh won’t work).
What is the meaning of 2 >& 1?
You use &1 to reference the value of the file descriptor 1 ( stdout ). So when you use 2>&1 you are basically saying “Redirect the stderr to the same place we are redirecting the stdout ”.
How do I get stderr in Linux?
It’s possible for a program to get information about STDERR on a linux system. You need to run the Perl script in a terminal. Depending on whether you have X on your system or not, you could use xterm or you could use a virtual console ( tty1-7 ) to run your script.
What happens if I first redirect stdout to a file and then redirect stderr to the same file?
When you redirect both standard output and standard error to the same file, you may get some unexpected results. This is due to the fact that STDOUT is a buffered stream while STDERR is always unbuffered.