insserv - 1.18.0-2 main

The insserv program is used by the standard SysV-based init system. It
updates the order of symlinks in /etc/rc?.d/ based on dependencies
specified by LSB headers in the init.d scripts themselves.
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These declared relations between scripts make it possible to optimize
the boot sequence for the currently installed set of packages, while
detecting and rejecting dependency loops.
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Using insserv incorrectly can result in an unbootable system.