[TUHS] reboot(2) system call
dave at horsfall.org
Sun Jan 31 08:27:10 AEST 2021
On Tue, 26 Jan 2021, Greg A. Woods wrote:
> The lore I was told at the time was that you alwasy ran three and that
> it didn't matter if they were all on the same line with semicolons or
> not because of the very fact that the second one would block.
What I was taught was:
% sync; sync; sync
The theory was that by waiting for the shell prompt each time, it gave the
buffer pool enough time to be flushed.
> The third one was just for superstitious good luck, and just in case
> there was a process still running and writing to a filesystem.
Never heard that theory, but naturally you did a "ps ax" first, didn't
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