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Operating Systems Solaris Queries related to runlevels and fdisk utility... Post 302312837 by TonyFullerMalv on Sunday 3rd of May 2009 06:17:25 PM
Old 05-03-2009
To answer question 2. an "init 0" takes you to the Open Boot Prom's (OBP) monitor prompt on a Sparc based Sun machine, an Intel based machine cannot be shutdown to the BIOS level so an init 0 has to just reboot an Intel box instead.

Concerning failsafe mode in question 1. again a Sparc based machine can have security password set and the security mode set to "command" such that one can only run "boot" from the OBP unless you provide the password, so a "boot -F failsafe" would cause you to have to supply the PROM password, Intel machine's BIOS can have a password set to prevent changing of settings but (I think I am correct in saying) not for passing parameters to the Operating system; an intel based Solaris server is therefore going to have to rely on the physical security of the room/data centre it is installed in.
 

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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)
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