How to hide bash command output and errors

To redirect both the output and the errors of a Bash command to /dev/null, you can use the following syntax:

command > /dev/null 2>&1

Here's what this command does:

  •  ">" is the redirection operator. It redirects the standard output (stdout) of "command" to a specified file. In this case, the file is "/dev/null".
  • "/dev/null" is a special file that discards all data written to it (it's often used to suppress output). You can think of it as the black hole of your Linux system.
  • "2>&1" redirects the standard error (stderr, file descriptor 2) to the same location as stdout (file descriptor 1).

In simple terms, "command > /dev/null 2>&1" will execute "command", and both the standard output and standard error will be redirected to "/dev/null", effectively silencing all output from the command.

Here's an example with a real command:

ls /some/nonexistent/directory > /dev/null 2>&1

This command tries to list the contents of a non-existent directory. Normally, it would produce an error message, but the redirection to "/dev/null" means that you won't see this error message.

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