It is always better to have MySQL Data Directory store in a specific partition/drive. It will help on performance and better management and scalability. You change change the data store directory in Linux by editing /etc/my.cnf file.

Edit /etc/my.cnf file

# vi /etc/my.cnf

Change the data directory structure

datadir=/db/mysql
socket=/db/mysql/mysql.sock

After the file has been updated, restart MySQL service.

/usr/local/bin/psql -c "SELECT email_address FROM members WHERE active is TRUE;" -U someuser -t -A -o member-email-address.txt accounting

psql is connecting to accounting database, query from members table and out the result into a txt file name member-email-address.txt.

-t – Return result only, do not result with table name.
-A – By default, returned result will have white space, this is to remove the white space.
-o – Output the result into a file.

You can create “root” alike privilege user in MySQL by following the step below;

• Access to mysql /usr/local/bin/mysql
• mysql> GRANT ALL PRIVILEGES ON *.* TO ‘yourusername’@’localhost’ IDENTIFIED BY ‘yourpasswordhere’ WITH GRANT OPTION;
• mysql> flush privileges;
• mysql> quit;

You can add a few more privileges user if you have more than 1 person to admin MySQL Database.

Follow the steps below to reset MySQL’s Root Password;

• Stop MySQL Service
• Start MySQL Service in Safe Mode: /usr/local/bin/mysqld_safe –skip-grant-tables&
• Connect to MySQL /usr/local/bin/mysql
• mysql> use mysql;
• mysql> UPDATE user set password=password(‘newpassword’) where user=’root’ and host=’localhost’;
• mysql> flush privileges;
• mysql> quit;
• Stop MySQL Service Again
• Start MySQL Service in normal mode

Log in to MySQL with your newly created password.