[CentOS] CentOS 8: what changed (regular UNIX admin commands)?

[Stephen John Smoogen]

On Tue, 22 Oct 2019 at 14:11, David G. Miller <dave at davenjudy.org> wrote:
>
> On 10/22/19 10:55 AM, Valeri Galtsev wrote:
> > Hello Experts!
> >
> > I'm sure many of you run CentOS for some time already.
> >
> > My question is: is there some place that lists which of the most often
> > used sysadmin commands are gone and what are replacements for them. Or
> > what else one needs to do after successful installation. (in the past
> > it was process accounting that was not enabled by default, but which
> > gives you quite some handle in investigating compromise).
> >
> > I just tried quite ordinaly command of freshly installed CentOS 8:
> >
> > last
> >
> > and got an error:
> >
> > last: (default utx db): No such file or directory
> >
> > I realize that it could be just me, and I'll cope with that myself one
> > way or another but this one prompted me to ask everybody: Is there
> > anything I can read so I can learn what differenmt to expect on CentOS
> > 8 from, say, CentOS 7?
> >
> > Thanks.
> > Valeri
> >
> > ++++++++++++++++++++++++++++++++++++++++
> > Valeri Galtsev
> > Sr System Administrator
> > Department of Astronomy and Astrophysics
> > Kavli Institute for Cosmological Physics
> > University of Chicago
> > Phone: 773-702-4247
> > ++++++++++++++++++++++++++++++++++++++++
> > _______________________________________________
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> > CentOS at centos.org
> > https://lists.centos.org/mailman/listinfo/centos
> Saw your later response that the problem was solved but this is an
> interesting question that deserves an answer (and not just what changed
> in RHEL8).  As an example, I'm used to ifconfig and route but keep
> getting reminded that these commands are now deprecated and "ip" should
> be used instead.  Likewise for using dnf instead of yum, systemctl

I think that the deprecation of ifconfig and route was started before
RHEL-7 came out.. and yet I just can't get used to them.

> instead of service, firewallcmd instead of iptables, etc. I wonder how
> many shell scripts there are "out there" that folks have written or
> accumulated over the years and which now need to be updated before
> deprecated becomes no longer available?  Or, like using iptables instead
> of firewallcmd, may cause something very different than what is expected.
>
> Anyone know of any resource out there that might provide such documentation?
>
> Cheers,
> Dave
>
> --
> "They that can give up essential liberty to obtain a little temporary safety deserve neither safety nor liberty."
>
> -- Benjamin Franklin
>
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-- 
Stephen J Smoogen.