So... what's a runlevel?

[Michael T. Richter]

OK, I'm seeing references to "runlevels" abounding here and there, but I
really don't know what one of those is.  The man page for runlevel(8)
isn't particularly helpful.  Is there some succinct reference to what
runlevels are, what they mean and why I might change them?

--
Michael T. Richter
Email: ttmrichter at gmail.com, mtr1966 at hotpop.com
MSN: ttmrichter at hotmail.com, mtr1966 at hotmail.com; YIM:
michael_richter_1966; AIM: YanJiahua1966; ICQ: 241960658; Jabber:
mtr1966 at jabber.cn

"I have never seen the poor people being so familiar with their heads of
state as they were with [Michele Duvalier]. It was a beautiful lesson
for me. I've learned something from it." --Mother Theresa
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