install phpmyadmin ubuntu 18.04

Shell
sudo apt-get install -y phpmyadmin

Open a terminal window on your Ubuntu Server.
Issue the command sudo apt-get install phpmyadmin php-mbstring php-gettext -y.
When prompted, type your sudo password.
Allow the installation to complete.sudo -i
apt-get install phpmyadmin php-mbstring php-gettext -y
exit
Source

Also in Shell: