From log:
Setting up mysql-server-5.5 (5.5.50-0ubuntu0.14.04.1) ... start: Job failed to start invoke-rc.d: initscript mysql, action "start" failed.
From log:
Setting up mysql-server-5.5 (5.5.50- 0ubuntu0. 14.04.1) ...
start: Job failed to start
invoke-rc.d: initscript mysql, action "start" failed.