Made some progress.
mysql-server works now.
Had to add:

innodb_buffer_pool_size = 64M

under section [mysqld] of
/etc/mysql/my.cnf and other .cnf files in the same or subfolders.

The sql server works now but apt is still coming up with the same error although the service runs with no error.

I have just tried a fresh flash of nanopi-duo_ubuntu-core-xenial_4.11.2_20170908 On first bootup through usb ttl adapter connect to wifi and continue through ssh. Apt-get update apt-get upgrade apt -get install mysql-server Eventually asks for mysql root pasword Then it comes up with this error: Set...

Hi, I am trying to install mysql-server using apt-get install but it doesn't succeed. Process: 4865 ExecStartPre=/usr/share/mysql/mysql-systemd-start pre (code=exited, status=1/FAILURE) Oct 01 22:16:35 NanoPi-Duo systemd[1]: Failed to start MySQL Community Server. Oct 01 22:16:35 NanoPi-Duo systemd[...