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% Building Murphy compatible embedded Linux systems
% Gilad Ben-Yossef (gilad@codefidence.com)
It's 2:00 a.m. An embedded Linux system
in the ladies' room of an Albuquerque gas station is
being updated remotely. Just as the last bytes hit the
flash, disaster strikes---the power fails. Now what?
The regular way of updating the configuration or
performing software upgrade of Linux systems is a \textit{nonsequitur}
in the embedded space. Still, many developers
use these methods, or worse, for lack of a better
alternative. This talk introduces a better
alternative---a framework for safe remote configuration and
software upgrade of a Linux system that supports atomic
transactions, parallel, interactive and programmed
updates, and multiple software versions with rollback
and all using using such ``novel'' concepts as POSIX
\ident{rename(2)}, Linux \ident{pivot_root(2)}, and the initrd/initramfs
mechanism.
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