[CentOS] logging in

Jon Pruente
Tue, 30 Jan 2018 18:40:08 -0000

On Tue, Jan 30, 2018 at 12:26 PM, <m.roth at 5-cent.us> wrote:

> This is.... odd.
>
> We're seeing a *lot* of
> sshd[8400]: Timeout, client not responding.
> So I'm trying to find out whose client is having issues. Trying to
figure
> that, after processes are gone, I tried looking in lastlog, which is where
> it gets odd. lastlog shows root coming in, and it shows a security account
> coming in... years ago.
>
> I see one of our users logging in a goodly number of times... but lastlog
> doesn't show him. I just logged in as myself, no password, using
keys...
> and lastlog doesn't show me, or my manager, or anyone else.
>
> Does anyone have any idea why lastlog's not recording *all* logins?
>

You can look at /var/log/audit/audit.log to see more detail than what last
shows. A nice tip is to pipe the output through another tool to convert the
timestamps to human readable date and time.

tail -f /var/log/audit/audit.log | ausearch -i
or
tail -f /var/log/audit/audit.log | perl -pe 's/(\d+)/localtime($1)/e'

via
https://serverfault.com/questions/327846/convert-selinux-log-date-format-from-epoch-to-normal