Install PHPMyAdmin after installing Mysql on Ubuntu 16.04

 sudo apt-get update
    sudo apt-get install phpmyadmin php-mbstring php-gettext

After opening PHPMyAdmin if you create a database and open it you may see

CONNECTION FOR CONTROLUSER AS DEFINED IN YOUR CONFIGURATION FAILED

You have to open this file

/etc/phpmyadmin/config-db.php

and see if the configuration is like this

$dbuser='root';
$dbpass='password'; // set current password between quotes ' '
$basepath='';
$dbname='phpmyadmin';
$dbserver='';
$dbport='';
$dbtype='mysql';

save and close the file

restart mysql server by

sudo service mysql stop

sudo service mysql start

Install and configure MySQL on Slackware

type mc

go to /etc/

copy my-large.cnf to my.cnf by pressing ctrl+F5

make the destination to /etc/my.cnf

press alt+o to save on the last opened window

press ctrl+F10 to exit from mc

type mysql_install_db

chown -R mysql:mysql /var/lib/MySQL

/etc/rc.d/rc.mysqld stop

/etc/rc.d/rc.mydsqld start

ps aux | grep mysql | grep -v grep

mysql should be listed

set root password

UPDATE mysql.user SET Password=PASSWORD('MyNewPass') WHERE User='root';