1.) I opened the terminal and typed in `su - ` to run as root.
2.) I then ran `mysql - u root`, which resulted in a lot of output and another prompt.
3.) I then typed in `UPDATE mysql.user SET Password=PASSWORD('NewPassHere')
    WHERE User='root';`

-bash: syntax error near unexpected token `('

bash: UPDATE: command not found...

[root@localhost ~]# /usr/bin/mysqladmin -u root password 'newpwd'
/usr/bin/mysqladmin: connect to server at 'localhost' failed
error: 'Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)'
Check that mysqld is running and that the socket: '/var/lib/mysql/mysql.sock' exists!

[root@localhost ~]# sudo service mysqld status
Redirecting to /bin/systemctl status  mysqld.service
mysqld.service
   Loaded: not-found (Reason: No such file or directory)
   Active: inactive (dead)

[root@localhost ~]# sudo service mysqld start
Redirecting to /bin/systemctl start  mysqld.service
Failed to issue method call: Unit mysqld.service failed to load: No such file or directory.

/usr/bin/mysqladmin -u root password 'new-password'

SELECT user, host FROM mysql.user WHERE user = 'root';

/usr/bin/mysqladmin -u root password 'new-password' -h127.0.0.1

[root@mail ~]# yum install mysql-server

[root@mail ~]# chkconfig mysqld on
[root@mail ~]# service mysqld start

[root@mail ~]# mysql_secure_installation
Enter current password for root (enter for none):
OK, successfully used password, moving on...
Set root password? [Y/n] y
New password:
Re-enter new password:
Password updated successfully!
Remove anonymous users? [Y/n] y
... Success!
Disallow root login remotely? [Y/n] n
... skipping.
Remove test database and access to it? [Y/n] y
- Dropping test database...
... Success!
- Removing privileges on test database...
... Success!
Reload privilege tables now? [Y/n] y
... Success!
Cleaning up...
All done!  If you've completed all of the above steps, your MySQL
installation should now be secure.
Thanks for using MySQL!

mysql -u root -p

use mysql

update user set authentication_string=password('NEWPASSWORD') where user='root';

flush privileges;

quit

mysql -u root