I want to be sure in what order services are started during boot process in Debian based systems (Debian Squeeze in particular).
Debian – How to list services/daemons started at boot _and_ check their loading order
bootdebianinitservice
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Best Answer
In short:
This shows you what starts at which runlevel, and within each level the order is determined by the number after the letter (K is Kill, S is start).
You can configure what starts at each runlevel with sysv-rc-conf, which is installable with apt.
e.g. on my system apache2 is symlinked in rc5.d as "S20apache2". A link in the same directory with S19 would start before it, something with S21 would start after it.
Further reading: