Difference between console and ttys

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ttys

TTYS(5) 							File Formats Manual							   TTYS(5)

NAME

       ttys - terminal initialization data

DESCRIPTION

       The  ttys  file	contains  information  that  is used by various routines to initialize and control the use of terminal special files. This
       information is read with the getttyent(3) library routines.  There is one line in the ttys file per special file.  Fields are separated	by
       tabs  and/or  spaces.   Some  fields  may contain more than one word and should be enclosed in double quotes.  Blank lines and comments can
       appear anywhere in the file; comments are delimited by `#' and new line. Unspecified fields default to null.  The first field is the termi-
       nal's  entry in the device directory, /dev.  The second field of the file is the command to execute for the line, typically getty(8), which
       performs such tasks as baud-rate recognition, reading the login name, and calling login(1).  It can be, however, any desired  command,  for
       example	the  start  up	for a window system terminal emulator or some other daemon process, and can contain multiple words if quoted.  The
       third field is the type of terminal normally connected to that tty line, as found in the termcap(5) data base file.  The  remaining  fields
       set  flags  in  the ty_status entry (see getttyent(3)) or specify a window system process that init(8) will maintain for the terminal line.
       As flag values, the strings `on' and `off' specify whether init should execute the command given in the second  field,  while  `secure'	in
       addition  to `on' allows root to login on this line.  These flag fields should not be quoted.  The string `window=' is followed by a quoted
       command string which init will execute before starting getty.  If the line ends in a comment, the comment is  included  in  the	ty_comment
       field of the ttyent structure.

       Some examples:

       console "/usr/libexec/getty std.1200"   vt100	    on secure
       ttyd0   "/usr/libexec/getty d1200"      dialup	    on	   # 555-1234
       ttyh0   "/usr/libexec/getty std.9600"   hp2621-nl    on	   # 254MC
       ttyh1   "/usr/libexec/getty std.9600"   plugboard    on	   # John's office
       ttyp0   none			       network
       ttyp1   none			       network	    off
       ttyv0   "/usr/new/xterm -L :0"	       vs100	    on window="/usr/new/Xvs100 0"

       The  first  example permits root login on the console at 1200 baud, the second allows dialup at 1200 baud without root login, the third and
       fourth allow login at 9600 baud with terminal types of "hp2621-nl" and "plugboard" respectively, the fifth and sixth line are  examples	of
       network	pseudo ttys, which should not have getty enabled on them, and the last example shows a terminal emulator and window system startup
       entry.

FILES

       /etc/ttys

SEE ALSO

       login(1), getttyent(3), gettytab(5), init(8), getty(8)

7th Edition							 November 16, 1996							   TTYS(5)

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