pma.sh

#!/usr/bin/env bash

apt-get install pwgen -y

MYSQL_ROOT_PASS="MYPASSWORD123" # Put yours

PHPMYADMIN_DIR="pmasecret879"      # You don't want script kiddies playing  
                                   # with your default phpMyAdmin install.
AUTOGENERATED_PASS=`pwgen -c -1 20`

echo "phpmyadmin phpmyadmin/reconfigure-webserver multiselect apache2" | debconf-set-selections
echo "phpmyadmin phpmyadmin/dbconfig-install boolean true" | debconf-set-selections
echo "phpmyadmin phpmyadmin/mysql/admin-user string root" | debconf-set-selections
echo "phpmyadmin phpmyadmin/mysql/admin-pass password $MYSQL_ROOT_PASS" | debconf-set-selections
echo "phpmyadmin phpmyadmin/mysql/app-pass password $AUTOGENERATED_PASS" |debconf-set-selections
echo "phpmyadmin phpmyadmin/app-password-confirm password $AUTOGENERATED_PASS" | debconf-set-selections

apt-get -y install phpmyadmin

# Regex FTW!
sed -i -r "s:(Alias /).*(/usr/share/phpmyadmin):\1$PHPMYADMIN_DIR \2:" /etc/phpmyadmin/apache.conf

php5enmod mcrypt # Needs to be activated manually (that's an issue for Ubuntu 14.04)

service apache2 reload