sulogin(1m) [bsd man page]

sulogin(1M)						  System Administration Commands					       sulogin(1M)

NAME

       sulogin - access single-user mode

SYNOPSIS

       sulogin

DESCRIPTION

       The  sulogin  utility  is  automatically invoked by init when the system is first started. It prompts the user to type the root password to
       enter system maintenance mode (single-user mode) or to type  EOF (typically <CTRL-D>) for normal startup (multi-user mode). The user should
       never directly invoke sulogin.

       The  sulogin utility can prompt the user to enter the root password on a variable number of serial console devices, in addition to the tra-
       ditional console device. See consadm(1M) and msglog(7D) for a description of how to configure a serial device to  display  the  single-user
       login prompt.

FILES

       /etc/default/sulogin    Default value can be set for the following flag:

			       PASSREQ	       Determines if login requires a password. Default is PASSREQ=YES.

       /etc/default/login      Default value can be set for the following flag:

			       SLEEPTIME       If  present,  sets  the number of seconds to wait before login failure is printed to the screen and
					       another login attempt is allowed. Default is 4 seconds. Minimum is 0 seconds. Maximum is 5 seconds.

					       Both su(1M) and login(1) are affected by the value of SLEEPTIME.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsr			   |
       +-----------------------------+-----------------------------+

SEE ALSO

	login(1), consadm(1M), init(1M), su(1M), attributes(5), msglog(7D)

SunOS 5.10							    25 Sep 2002 						       sulogin(1M)

SULOGIN(8)						       System Administration							SULOGIN(8)

NAME

       sulogin - Single-user login

SYNOPSIS

       sulogin [options] [tty]

DESCRIPTION

       sulogin is invoked by init when the system goes into single user mode.

       The user is prompted:

	    Give root password for system maintenance
	    (or type Control-D for normal startup):

       sulogin	will  be  connected  to  the  current terminal, or to the optional tty device that can be specified on the command line (typically
       /dev/console).

       After the user exits the single-user shell or presses control-D at the prompt, the system will continue to boot.

OPTIONS

       -e, --force
	      If the default method of obtaining the root password via getpwnam(3)  from  the  system  fails,  manually  examine  /etc/passwd  and
	      /etc/shadow to get the password.	If they are damaged or nonexistent, sulogin will start a root shell without asking for a password.

	      Only use the -e option if you are sure the console is physically protected against unauthorized access.

       -p, --login-shell
	      Specifying this option causes sulogin to start the shell process as a login shell.

       -t, --timeout seconds
	      Specify the maximum amount of time to wait for user input.  By default, sulogin will wait forever.

       -h, --help
	      Print a help message.

       -V, --version
	      Output version.

ENVIRONMENT VARIABLES

       sulogin looks for the environment variable SUSHELL or sushell to determine what shell to start.	If the environment variable is not set, it
       will try to execute root's shell from /etc/passwd.  If that fails it will fall back to /bin/sh.

AUTHOR

       sulogin was written by Miquel van Smoorenburg for sysvinit and later ported to util-linux by Dave Reisner and Karel Zak.

AVAILABILITY

       The sulogin command is part of the util-linux package and is available  from  Linux  Kernel  Archive  <ftp://ftp.kernel.org/pub/linux/utils
       /util-linux/>.

util-linux							     Jul 2012								SULOGIN(8)