Adminer is a tool for managing content in MySQL databases which is very simple and far better than phpMyAdmin. Adminer is distributed under Apache license in a form of a single PHP file. Its author is Jakub Vrána who started to develop this tool as a light-weight alternative to phpMyAdmin.
How to install Adminer on Debian/Ubuntu
Adminer works with MySQL, MariaDB, PostgreSQL, SQLite, MS SQL, Oracle, SimpleDB, Elasticsearch, MongoDB and Supports PHP 5 and 7 and above with enabled sessions
Install PHP
sudo apt install php libapache2-mod-php php-cli php-fpm php-json php-pdo php-mysql php-zip php-gd php-mbstring php-curl php-xml php-pear php-bcmath
Download Adminer file from official website
sudo wget https://github.com/vrana/adminer/releases/download/v4.7.7/adminer-4.7.7.php
Rename & move adminer-4.7.7.php to web document root
sudo mv adminer-4.7.7.php adminer.php && sudo mv adminer.php /var/www/html
Access adminer
http://localhost/adminer.php
Reference:
https://www.adminer.org/