How do I redirect output and error to a file in Linux?

How do I redirect a Linux error?

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.

How do I redirect all output to a file in Linux?


  1. command > output.txt. The standard output stream will be redirected to the file only, it will not be visible in the terminal. …
  2. command >> output.txt. …
  3. command 2> output.txt. …
  4. command 2>> output.txt. …
  5. command &> output.txt. …
  6. command &>> output.txt. …
  7. command | tee output.txt. …
  8. command | tee -a output.txt.

How do you redirect output and error?

Redirecting stderr to stdout

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 . The order of redirection is important.

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How do I redirect standard output to a file?

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.

What Linux command would you use to redirect output to a file and have it display on stdout?

Redirect Output to File Using “>>” Symbol

When you use this “>>” redirection symbol, it will redirect command output into a specific file, and ensure that the last saved data should not get a wipe and append new output into the same file.

Which command will copy error message to a file?

cp stands for copy. This command is used to copy files or group of files or directory.

How do I redirect top command output to a file?

How to capture the top command output to a file every 5 minutes for an hour

  1. -n : Specifies the maximum number of iterations.
  2. -b : Batch-mode operation (Starts top command in Batch mode to redirect the output to other programs or to a file)
  3. -d : Delay-time interval (Specifies the delay between screen updates)

How do I redirect all output files in UNIX?

How do I redirect all output to a file in Linux?

  1. command > output. txt. …
  2. command >> output. txt. …
  3. command 2> output. txt. …
  4. command 2>> output. txt. …
  5. command &> output. txt. …
  6. command &>> output. txt. …
  7. command | tee output. txt. …
  8. command | tee -a output. txt.

Which command is use to redirect and overwrite output to a file?

As we saw before, the cat command concatenates files and puts them all together to the standard output. By redirecting this output to a file, this file name will be created – or overwritten if it already exists, so take care.

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How do I redirect a log file?

To redirect the output of a command to a file, type the command, specify the > or the >> operator, and then provide the path to a file you want to the output redirected to. For example, the ls command lists the files and folders in the current directory.

How do I redirect both standard and standard error on the same location?

Discussion. &> or >& is a shortcut that simply sends both STDOUT and STDERR to the same place—exactly what we want to do.

Which operator is used to redirect standard output and error in Linux Mcq?

Explanation: Redirecting standard error requires the 2> symbol.

How do you redirect output?

On a command line, redirection is the process of using the input/output of a file or command to use it as an input for another file. It is similar but different from pipes, as it allows reading/writing from files instead of only commands. Redirection can be done by using the operators > and >> .