09-05-2002
On solaris, "shutdown -i6 -g0 -y" is very close to "init 6". But with shutdown, you could have used -g60. You can't do that calling init directly. The reboot command basicly just invokes the uadmin system call. It is a rough shutdown, but it is a bit better than just letting power drop so it might be used by a ups with only a few seconds of battery power or something.
I prefer the shutdown command. A SunOS dude tried the init thing on HP-UX...which is a very bad move. HP has a poor inittab structure and changing run levels via init will bypass the shutdown scripts. So (I think) the shutdown command may be more universal. But my universe is just SunOS and HP-UX...
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