PASSWORD SET FOR ROOT USER IN MYSQL
If the root user has no password set , then you can set the password manually by this way
Method 1:
[root@tibero ~]# mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 11
Server version: 5.1.73 Source distribution
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Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> set password for 'root'@'localhost'=PASSWORD('oracle');
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
Method 2:
mysql> update mysql.user set password=password('oracle') where user='root';
Query OK, 1 row affected (0.00 sec)
Rows matched: 3 Changed: 1 Warnings: 0