thank you for reporting this.
Relevant error lines are:
170413 23:22:37 [ERROR] /usr/sbin/mysqld: unknown variable
170413 23:22:37 [ERROR] Aborting
Can you verify where this variable is set?
$ sudo grep -r "log-slow-queries" /etc/mysql
Can you also explain us the steps that led to this?
** Changed in: mariadb-10.0 (Ubuntu)
Status: New => Incomplete
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package mariadb-server-10.0 10.0.29-0ubuntu0.16.04.1 failed to
install/upgrade: subprocess installed post-installation script
returned error exit status 7
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