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

Valeri Galtsev

galtsev at kicp.uchicago.edu
Tue Oct 22 17:30:40 UTC 2019



On 2019-10-22 12:20, Stephen John Smoogen wrote:
> On Tue, 22 Oct 2019 at 12:55, Valeri Galtsev <galtsev at kicp.uchicago.edu> 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
>>
> 
> Huh. When I run it I got
> 
> [root at localhost ~]# last
> root     pts/0        192.168.1.15     Sat Oct 19 15:42   still logged in
> reboot   system boot  4.18.0-80.11.2.e Fri Oct 18 09:39   still running
> root     pts/1        192.168.1.15     Thu Oct 17 14:16 - 09:38  (19:22)

Indeed, as I suspected, it was just me. Really stupid thing: I shuffled 
two hostnames (one was freshly installed CentOS 8 machine, another was 
jail inside some FreeBSD machine...). Puzzle solved, but thanks to that 
I'm reading RedHat's document about what's new in RedHat 8 compared to 
7, - Thank you, Leon, for link in your reply!

Valeri

> smooge   pts/1        192.168.1.15     Fri Oct  4 18:14 - 13:24 (12+19:10)
> smooge   pts/1        192.168.1.15     Fri Oct  4 09:02 - 09:09  (00:06)
> smooge   pts/1        192.168.1.15     Thu Oct  3 16:31 - 16:46  (00:14)
> smooge   pts/2        192.168.1.15     Mon Sep 23 17:23 - 09:05  (15:41)
> smooge   pts/1        192.168.1.15     Sat Sep 21 14:45 - 10:36 (5+19:51)
> smooge   pts/1        192.168.1.15     Thu Sep 19 17:04 - 17:05  (00:01)
> smooge   pts/1        192.168.1.15     Mon Sep 16 13:06 - 17:02  (03:55)
> smooge   tty2         tty2             Thu Sep 12 12:43 - down  (35+20:55)
> reboot   system boot  4.18.0-80.el8.x8 Thu Sep 12 12:33 - 09:38 (35+21:05)
> 
> In el7 it used to be in this package:
> [smooge at batcave01 ansible (master)]$ rpm -qf /usr/bin/last
> sysvinit-tools-2.88-14.dsf.el7.x86_64
> 
> And in el8 it is in
> [root at localhost ~]# rpm -qf /usr/bin/last
> util-linux-2.32.1-8.el8.x86_64
> 
> The wtmp file is owned by
> [root at localhost ~]# rpm -qf /var/log/wtmp
> systemd-239-13.el8_0.5.x86_64
> 
> However as you can tell from above this system has been installed for
> a bit so I am guessing whatever creates wtmp hasn't happened?
> 
>> 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
>> ++++++++++++++++++++++++++++++++++++++++
>> _______________________________________________
>> CentOS mailing list
>> CentOS at centos.org
>> https://lists.centos.org/mailman/listinfo/centos
> 
> 
> 

-- 
++++++++++++++++++++++++++++++++++++++++
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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