Hello
After crash my HD I must install all software on my pc.
I'm running Ubuntu 16.04.LTS. Have set a PPA for cqrlog and update.
then run apt-get install cqrlog.
after this i see in the terminal as follows

/var/cache/apt/archives/mysql-server-5.7_5.7.20-0ubuntu0.16.04.1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

when i start cqrlog the screen display : Error during connection to database: TMySQL57Connection : Server connect failed.

Can help anybody??