Article 60544 of comp.sys.sun.admin: Path: mri.com!newsfeed1.aimnet.com!news.aimnet.com!peerfeed.ncal.verio.net!nntp2.cerf.net!news.idt.net!ais.net!news-peer.sprintlink.net!news.sprintlink.net!Sprint!worldnet.att.net!newsadm From: Chip Bennett Newsgroups: comp.sys.sun.admin Subject: Re: shutdown -i0 vs. init 0 vs. halt Date: Sun, 19 Oct 1997 00:56:03 -0500 Organization: AT&T WorldNet Services Lines: 29 Message-ID: <3449A0F2.760B5493@worldnet.att.net> References: <34467C67.66FF518A@ubs.com> NNTP-Posting-Host: 12.66.2.135 Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 4.01 [en] (Win95; U) To: "Cao,Kexi" X-Priority: 3 (Normal) Cao,Kexi wrote: > Could someone tell me the technical detail on shutdown vs. init 0 vs. > halt. I have some rough ideas but am not sure the specific > differences. > Thanks. > > KC > > -- > Kexi Cao (KC) Union Bank of Switzerland > kexi.cao@ny.ubs.com 299 Park Ave., New York, NY 10171 > (212)-821-6516 "halt" pretty much just syncs the disks and then stops the CPUs. Pretty abrupt, but better than turning off the power. "shutdown -i0" and "init 0" run the rc0 scripts first. "shutdown" is not much different than "init", except that "shutdown" allows a grace period and "wall"s a message to your users. "init" changes the state of the init daemon process to whatever value you pass as an argument. /etc/inittab has a list of commands to execute based on the new state. For "init 0" look for the state "0" command(s) and follow the calls to subsequent scripts to trace down exactly what happens. If you don't have access to AnswerBook to look up these commands, may I recommend http://docs.sun.com Chip Bennett