how to start mysql server in ubuntu code example

Example 1: start mysql server ubuntu

sudo service mysql-server

Example 2: start mysql server linux terminal

sudo /etc/init.d/mysql start
or 
systemctl start mysql.service

Example 3: start stop mysql linux

service mysql start
service mysql stop
service mysql restart

Example 4: setup mysql ubuntu

sudo apt install mysql-server
sudo mysql_secure_installation utility

Example 5: start mysql

mysql-ctl cli

Example 6: mysql enter ubuntu

mysql -u root -p