How to Start MySQL? MySQL isn't starting.

edit

First, MySQL was replaced by MariaDB since Fedora 19 (http://fedoraproject.org/wiki/Features/ReplaceMySQLwithMariaDB).

To install MariaDB Server you have to execute the following command:

yum install mariadb mariadb-server

To start MariaDB on Fedora 20, execute the following command:

systemctl start mariadb.service

To autostart MariaDB on Fedora 20, execute the following command:

systemctl enable mariadb.service

After you started MariaDB (do this only once), execute the following command:

/usr/bin/mysql_secure_installation

This command will ask you some inputs to set root password, remove anonymous users, disallow root login remotely, remove test database and reload privilege tables.

Officially fedora replaced by MariaDB mysql. Perhaps this is the problem. Try it: systemctl status mariadb mariadb.service

systemctl enable mariadb 
systemctl start mariadb

Tried local install of mysql.rpm from their web site, tried mariadb, nothing makes it start...

mariadb.service - MariaDB 10.0 database server
Loaded: loaded (/usr/lib/systemd/system/mariadb.service; enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Mon 2016-06-20 23:02:26 BRT; 31s ago
Process: 7993 ExecStopPost=/usr/libexec/mysql-wait-stop (code=exited, status=0/SUCCESS)
**Process: 7771 ExecStartPost=/usr/libexec/mysql-wait-ready $MAINPID (code=exited, status=1/FAILURE)**
Process: 7769 ExecStart=/usr/bin/mysqld_safe --basedir=/usr (code=exited, status=0/SUCCESS)
Process: 7724 ExecStartPre=/usr/libexec/mysql-prepare-db-dir %n (code=exited, status=0/SUCCESS)
Process: 7687 ExecStartPre=/usr/libexec/mysql-check-socket (code=exited, status=0/SUCCESS)
Main PID: 7769 (code=exited, status=0/SUCCESS)

Jun 20 23:02:25 localhost.murilopan systemd[1]: Starting MariaDB 10.0 database server...
Jun 20 23:02:25 localhost.murilopan mysqld_safe[7769]: 160620 23:02:25 mysqld_safe Logging to '/var/log/mariadb/mariadb.log'.
Jun 20 23:02:25 localhost.murilopan mysqld_safe[7769]: 160620 23:02:25 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
Jun 20 23:02:26 localhost.murilopan systemd[1]: mariadb.service: Control process exited, code=exited status=1
Jun 20 23:02:26 localhost.murilopan systemd[1]: Failed to start MariaDB 10.0 database server.
Jun 20 23:02:26 localhost.murilopan systemd[1]: mariadb.service: Unit entered failed state.
Jun 20 23:02:26 localhost.murilopan systemd[1]: mariadb.service: Failed with result 'exit-code'.
ere

ANY SUGGESTIONS, PLEASE?