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Special Forums Cybersecurity Datacenter Crash (Server Unreachable for About 17 minutes) Post 303044488 by Neo on Monday 24th of February 2020 08:32:34 AM
Old 02-24-2020
Datacenter Crash (Server Unreachable for About 17 minutes)

Datacenter is trying to determine why the server when down.

All log files show no errors, including syslog, dmesg, etc and there are no core files.

Dashboard and stats show no unusual activity and light CPU load prior to crash.

I suspect a power issue in the datacenter. The datacenter team is looking into it.

Thank you for your patience and sorry for the short outage.


Code:
reboot   system boot  4.15.0-33-generi Mon Feb 24 07:00   still running
root     pts/0        159.192.217.25   Mon Feb 24 06:37 - crash  (00:22)

I'll post back if they come up with a reason on the datacenter end.

My searches of the file system and logs show no errors or internal server issues.
 

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LAST,LASTB(1)						Linux System Administrator's Manual					     LAST,LASTB(1)

NAME
last, lastb - show listing of last logged in users SYNOPSIS
last [-R] [-num] [ -n num ] [-adiox] [ -f file ] [ -t YYYYMMDDHHMMSS ] [name...] [tty...] lastb [-R] [-num] [ -n num ] [ -f file ] [ -t YYYYMMDDHHMMSS ] [-adiox] [name...] [tty...] DESCRIPTION
Last searches back through the file /var/log/wtmp (or the file designated by the -f flag) and displays a list of all users logged in (and out) since that file was created. Names of users and tty's can be given, in which case last will show only those entries matching the arguments. Names of ttys can be abbreviated, thus last 0 is the same as last tty0. When last catches a SIGINT signal (generated by the interrupt key, usually control-C) or a SIGQUIT signal (generated by the quit key, usu- ally control-), last will show how far it has searched through the file; in the case of the SIGINT signal last will then terminate. The pseudo user reboot logs in each time the system is rebooted. Thus last reboot will show a log of all reboots since the log file was created. Lastb is the same as last, except that by default it shows a log of the file /var/log/btmp, which contains all the bad login attempts. OPTIONS
-num This is a count telling last how many lines to show. -n num The same. -t YYYYMMDDHHMMSS Display the state of logins as of the specified time. This is useful, e.g., to determine easily who was logged in at a particular time -- specify that time with -t and look for "still logged in". -R Suppresses the display of the hostname field. -a Display the hostname in the last column. Useful in combination with the next flag. -d For non-local logins, Linux stores not only the host name of the remote host but its IP number as well. This option translates the IP number back into a hostname. -i This option is like -d in that it displays the IP number of the remote host, but it displays the IP number in numbers-and-dots nota- tion. -o Read an old-type wtmp file (written by linux-libc5 applications). -x Display the system shutdown entries and run level changes. NOTES
The files wtmp and btmp might not be found. The system only logs information in these files if they are present. This is a local configura- tion issue. If you want the files to be used, they can be created with a simple touch(1) command (for example, touch /var/log/wtmp). FILES
/var/log/wtmp /var/log/btmp AUTHOR
Miquel van Smoorenburg, miquels@cistron.nl SEE ALSO
shutdown(8), login(1), init(8) Jul 29, 1999 LAST,LASTB(1)
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