Quick method to change/create ysql root password

MySQL Tips: Howto change the MySQL root password

Here is a quick tip that will show several methods to change the mysql root password (that is normally empty at mysql initial install).
Method 1: using the SET PASSWORD command:

mysql -u root
mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('newpass');
Method 2: using mysqladmin

mysqladmin -u root password "newpass"

if there was already a mysql root password set, change this to:

mysqladmin -u root password oldpass "newpass"
Method 3: using UPDATE to directly edit the users table

mysql -u root
mysql> use mysql;
mysql> UPDATE user SET Password = PASSWORD('newpass') WHERE User = 'root';
mysql> FLUSH PRIVILEGES;