[CentOS] CentOS and typical usage

Sun Dec 13 20:45:42 UTC 2015
Valeri Galtsev <galtsev at kicp.uchicago.edu>

On Sun, December 13, 2015 11:36 am, Alice Wonder wrote:
> On 12/13/2015 08:39 AM, Timothy Murphy wrote:
>> Alice Wonder wrote:
>>> One of the benefits of systemd is the dependency based parallel
>>> The same speed can often be achieved with system V init by fine tuning
when the services start but systemd does that automatically.
>> If it's no faster then why is it a benefit?
> Binary logs with checksums is one benefit, much harder for a hacker or
malware to hide its tracks.

Without intent to be a pain in a... just respectfully disagreeing.

Harder only from the point of view current tools script kiddies use will
not deal with then. Fundamentally better security/forensics wise would be
to keep logs on remote secure server. Like in the very first computer
security lesson: you can not trust anything on compromised machine.

> Binary logging also makes it easier / faster to look at specific types
of events in the log.

Disagree. It is so only for people who are not familiar with few UNIX
tools such as grep, e.g.

> And sockets can be used before the service is actually started, so
services that want to log for example can start before the logger is
finished coming up.
> And it allows services to start on demand and stop when no longer
needed. I don't use that, but that is not as easy to do with system V init.

We always considered starting new process in UNIX to be very expensive.
Much more expensive than keeping the process in sleeping state. Sorry to
contradict again... or am I missing something?

> It also reduces issues related to poorly scripted init scripts, and
needing to sometimes change the numbers to make sure services start in the
correct order.

I am not getting your logic here. If something is poorly written _it_ has
to be fixed. Building the whole new building involves much more effort
than just small thing like init script.

> There are benefits, at least to some people. And there isn't anything I
could do with System V that can't be accomplished with systemd.
> systemd isn't critical to use, not for me, but other than needing to do
a little research and learning, it also isn't a negative.

It is not, you are right. But with my finite mental abilities and avalable
time I always find many extremely worty things to learn, this one not the
first on the list. But in the end a have a feeling that arguing on this
subject as the same senseless as religios one between those who believe
that God created people and those whe believe tha people created God for


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Valeri Galtsev
Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247