El servidor Ubuntu 14.04 se desconectó de repente

El servidor Ubuntu 14.04 se desconectó de repente

Veo lo siguiente en syslog, no estoy seguro de qué salió mal, se agradecerá cualquier ayuda. ¿Esto se debe a una actualización automática del kernel cuando veo una nueva versión del kernel?

May 17 10:20:36 vps rsyslogd: [origin software="rsyslogd" swVersion="7.4.4" x-pid="456" x-info="http://www.rsyslog.com"] start
May 17 10:20:36 vps rsyslogd-3003: invalid or yet-unknown config file command 'KLogPermitNonKernelFacility' - have you forgotten to load a module? [try http://www.rsyslog.com/e/3003 ]
May 17 10:20:36 vps rsyslogd: rsyslogd's groupid changed to 104
May 17 10:20:36 vps rsyslogd: rsyslogd's userid changed to 101
May 17 10:20:36 vps rsyslogd-2039: Could no open output pipe '/dev/xconsole': No such file or directory [try http://www.rsyslog.com/e/2039 ]
May 17 10:20:37 vps /etc/init.d/mysql[534]: 160517 10:20:37 mysqld_safe Can't log to error log and syslog at the same time.  Remove all --log-error configuration options for --syslog to take effect.
May 17 10:20:39 vps /etc/mysql/debian-start[969]: Upgrading MySQL tables if necessary.
May 17 10:20:39 vps /etc/mysql/debian-start[972]: /usr/bin/mysql_upgrade: the '--basedir' option is always ignored
May 17 10:20:39 vps /etc/mysql/debian-start[972]: Looking for 'mysql' as: /usr/bin/mysql
May 17 10:20:39 vps /etc/mysql/debian-start[972]: Looking for 'mysqlcheck' as: /usr/bin/mysqlcheck
May 17 10:20:39 vps /etc/mysql/debian-start[972]: Version check failed. Got the following error when calling the 'mysql' command line client
May 17 10:20:39 vps /etc/mysql/debian-start[972]: ERROR 1045 (28000): Access denied for user 'debian-sys-maint'@'localhost' (using password: YES)
May 17 10:20:39 vps /etc/mysql/debian-start[972]: FATAL ERROR: Upgrade failed
May 17 10:20:39 vps /etc/mysql/debian-start[987]: Checking for insecure root accounts.

Respuesta1

Ha cambiado o eliminado los usuarios de Debian utilizados para mantener MySQL. 'debian-sys-maint'@'localhost' http://www.electrictoolbox.com/restore-debian-sys-maint-mysql-user/

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