mysql service can not start automatically at boot up

For whatever reason my MySQL server crashed (all databases were corrupted) and I had to use mysql_install_db initialise mysql data directory. This installation worked. However I have to start the server manually every time it reboots. I have tried to run sudo update-rc.d mysql defaults so that it should start automatically at boot time but the MySQL server does not start. One thing I can remember is that after finishing installation using mysql_install_db there was this generic message

"To start mysqld at boot time you have to copy
support-files/mysql.server to the right place for your system"

According to some quarters the right place for the system (Ubuntu 14.04.2 LTS (GNU/Linux 3.16.0-77-generic x86_64)) is
/etc/init.d/

but the problem at hand is the location of support-files/mysql.server. I have tried

$ sudo find / -name mysql.server

and outputs nothing. Where is support-files/mysql.server located so that I should copy it to /etc/init.d/.

MySQL version is mysql Ver 14.14 Distrib 5.5.50, for debian-linux-gnu (x86_64). Initially I used installation DVD to install LAMP. Your help will be greatly appreciated.

A thousand ways to kill a rat.The mysql server can be started manually by running the following commands:

sudo service mysql stop
sudo /etc/init.d/mysql stop
sudo killall -KILL mysql mysqld_safe mysqld
sudo /etc/init.d/mysql start
sudo service mysql start

Automate these series of commands by putting them in Ubuntu rc.local file. A crontab at boot up may execute the commands prematurely.