I have write an onekey installation script in bash,it is tested .

DEBIANFRONTEND=noninteractive DEBIANPRIORITY=critical
mysqlword="xyzzy"
echo mysql-server mysql-server/rootpassword password $mysqlword | debconf-set-selections
echo mysql-server mysql-server/rootpassword_again password $mysqlword | debconf-set-selections
apt-get -q -y install apache2 mysql-server php5 php-pear php5-mysql php5-gd

mysql -u root -p$mysqlword -e"CREATE DATABASE wpdatabase;"
mysql -u root -p$mysqlword -e"use wpdatabase;"

mysql -u root -p$mysqlword -e"CREATE USER wpuser@localhost;"

mysql -u root -p$mysqlword -e"SET PASSWORD FOR wpuser@localhost= PASSWORD('dbpassword');"
mysql -u root -p$mysqlword -e"GRANT ALL PRIVILEGES ON wpdatabase.* TO wpuser@localhost IDENTIFIED BY 'dbpassword';"
mysql -u root -p$mysqlword -e"FLUSH PRIVILEGES;"

wget http://wordpress.org/latest.tar.gz
tar -xzvf latest.tar.gz
cp ~/wordpress/wp-config-sample.php ~/wordpress/wp-config.php

file="/root/wordpress/wp-config.php"
d1="define('DBNAME', 'databasenamehere');"
d2="define('DBUSER', 'usernamehere');"
d3="define('DBPASSWORD', 'passwordhere');"
s1="define('DBNAME', 'wpdatabase');"
s2="define('DBUSER', 'wpuser');"
s3="define('DBPASSWORD', 'dbpassword');"
sed -i "s/$d1/$s1/g" $file
sed -i "s/$d2/$s2/g" $file
sed -i "s/$d3/$s3/g" $file

mv /root/wordpress/* /var/www/

Now when i input my serverip, there is the wordpress installatioin web.

The last step remain,you can input info by hand,how can i do that automatically with bash? or with python?