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An Overview of Boots and Shutdowns

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explain ``bootstrapping''

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boot: bios read boot sector; boot sector reads in kernel; kernel initializes itself and runs init; init runs /etc/rc and/or other scripts and starts gettys and other programs

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shutdown: all processes are told to quit (sigterm); wait; then kill any that didn't quit (sigkill); sync; unmount all filesystems; halt the system; just cutting the power might cause something to go wrong



Ross Biro
Mon May 22 09:14:56 PDT 1995