echo [ -neE ] [ arg ... ]
       Write each arg on the standard output, with a space
       separating each one.  If the -n flag  is  not  pre-
       sent,  print a newline at the end.  echo recognizes
       the following escape sequences:

       \a     bell character
       \b     backspace
       \b     suppress final newline
       \e     escape
       \f     form feed
       \n     linefeed (newline)
       \r     carriage return
       \t     horizontal tab
       \v     vertical tab
       \\     backslash
       \0NNN  character code in octal
       \xNN   character code in hexadecimal

       The -E flag, or the BSD ECHO option, can be used to
       disable  these  escape  sequences.   In  the latter
       case, -e flag can be used to enable them.
