How do I stop nohup redirecting stderr to stdout?

How do I stop nohup redirecting stderr to stdout?

3 Answers. To make sure that your application is disassociated from its terminal – so that it will not interfere with foreground commands and will continue to run after you logout – nohup ensures that neither stdin nor stdout nor stderr are a terminal-like device.

Does nohup redirect stderr?

From the command line you cannot create a case in which, as you say, nohup only redirects stderr-outputs. nohup always writes stdout and stderr to a file. stdout goes either to one you specify via redirection, or to nohup. out ; stderr follows stdout unless you explicitly redirect it to another file.

How do I redirect stderr to stdout?

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 do I redirect nohup output?

By default, nohup command sends output of commands to nohup. out file in your present working directory.. You can view its content in any file editor. If you want to redirect the output of nohup command to file, just add it at the end of command after > redirection operator.

What does Dev Null 2 &1 mean?

/dev/null is a special filesystem object that discards everything written into it. Redirecting a stream into it means hiding your program’s output. The 2>&1 part means “redirect the error stream into the output stream”, so when you redirect the output stream, error stream gets redirected as well.

How do you stop a nohup process?

16 Answers. When using nohup and you put the task in the background, the background operator ( & ) will give you the PID at the command prompt. If your plan is to manually manage the process, you can save that PID and use it later to kill the process if needed, via kill PID or kill -9 PID (if you need to force kill).

Does nohup append or overwrite?

Just using nohup without any redirection the file nohup. out is written in append mode . sets the file to length zero and subsequent output of the program is written to nohup.

Which of the following is used to redirect stderr stdout?

You can use &[FILE_DESCRIPTOR] to reference a file descriptor value; Using 2>&1 will redirect stderr to whatever value is set to stdout (and 1>&2 will do the opposite).

What is difference between nohup and &?

nohup and & performs the same task. nohup command catches the hangup signal (do man 7 signal for help) whereas the ampersand/& doesn’t. When we run a command using & and exit the shell afterwards, the shell will kill the sub-command with the hangup(SIGHUP) signal (kill -SIGHUP).

How do I close nohup process?

When to redirect stdout to a standard error?

If neither file can be created or opened for appending, utility shall not be invoked. If the standard error is a terminal, all output written by the named utility to its standard error shall be redirected to the same file descriptor as the standard output. You redirected stdout to a file when you typed > exhibitor.out in your command line.

How to redirect stderr to a different file?

You redirected stdout to a file when you typed > exhibitor.out in your command line. If you’re OK with having your application’s stderr be directed to the same file as its stdout, you don’t need to do anything else. Or you can redirect stderr to a different file by adding an argument such as 2> exhibitor.err.

What happens if nohup.out cannot be opened?

If nohup.out cannot be created or opened for appending, the output shall be appended to the end of the file nohup.out in the directory specified by the HOME environment variable. If neither file can be created or opened for appending, utility shall not be invoked.