How do I redirect a shell script error and console output to a file?

How do I redirect a shell script error and console output to a file?

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

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

How do I redirect a file?

4.5. File Redirection

  1. stdin Redirection. Redirect standard input from a file (instead of the keyboard) using the < metacharacter.
  2. stdout Redirection. Redirect standard output to a file (instead of the terminal) using the > metacharacter.
  3. stderr Redirection.

Which command will redirect who Output to file called as file1?

in a shell command instructs the shell to read input from a file called “file1” instead of from the keyboard. EXAMPLE:Use standard input redirection to send the contents of the file /etc/passwd to the more command: more < /etc/passwd.

How do I redirect error and output to a file?

2 Answers

  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 can you append the error message to a file of command?

Use command >> file_to_append_to to append to a file. CAUTION: if you only use a single > you will overwrite the contents of the file. To ensure that doesn’t ever happen, you can add set -o noclobber to your .

How do you redirect output and error to a file?

How do I redirect a Linux error to a file?

The redirection operator (command > file) only redirects standard output and hence, the standard error is still displayed on the terminal. The default standard error is the screen. The standard error can also be redirected so that error messages do not clutter up the output of the program.

What is output redirection give an example?

The ‘>’ symbol is used for output (STDOUT) redirection. Here the output of command ls -al is re-directed to file “listings” instead of your screen. If there is an existing file with the same name, the redirected command will delete the contents of that file and then it may be overwritten.” …

How to redirect files in a shell script?

You can then redirect those streams to wherever you like via the ” > /dev/null ” or ” 2> /dev/null ” syntax, according to the output you want to redirect. The default is file descriptor 1 ( stdout ). My Shell Scripting books, available in Paperback and eBook formats.

How to redirect output to a descriptor?

Another common use for redirecting output is redirecting only stderr. To redirect a file descriptor, we use N>, where N is a file descriptor. If there’s no file descriptor, then stdout is used, like in echo hello > new-file.

How to redirect output from a terminal to a file?

By default, stdout and stderr are printed to your terminal – that’s why you can see them at all. But we can redirect that output to a file using the > operator: The second echo didn’t print anything to the terminal because we redirected its output to a file named new-file . Actually > new-file does two things:

Is there way to redirect file to console?

You can use all the redirect options as in Nathan Hartley’s answer. Since this is a straight redirect to file, it won’t output to the console (often helpful). If you desire the console output, combined all output with *&>1, and then pipe with Tee-Object: