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Re: OT: Programming (was Re: word creation algorithm)

From:Philip Newton <philip.newton@...>
Date:Monday, January 28, 2008, 8:12
On Jan 27, 2008 11:15 PM, Mark J. Reed <markjreed@...> wrote:
> In a similar vein, for a long time the standard idiom to reboot a UNIX > system was to run the command "sync", then run the command "sync" again, and > only then run the command "reboot". The "sync" is supposed to "sync"hronize > the portions of the file system buffered in memory with the actual files on > disk, so that the system comes back up in a consistent state, but it > actually only puts a request for a sync operation in the OS's processing > queue, so if you do the reboot right away it might not have done anything > yet...
Whereas if you "sync" twice, then during the time that you're typing in the second "sync" command, the system might have got around to executing the first one :) (Was it really "sync; sync; halt" or "sync; sync; sync; halt"? I think I've seen both versions.) Cheers, -- Philip Newton <philip.newton@...>