Hello Hb_Kai.
I'm running Debian (ubuntu father) and that guide looks pretty straight forward
try these steps to see if works
1.- Type
http://localhost/phpmyadmin/index.php to see if you can access phpmyadmin
if that doesn't work follow steps 2, 3 and 4.
2.- Purge all packages installed (do a sudo su first), this will uninstall all packages, dependencies and configuration files.
Code:
aptitude purge mysql-server mysql-client apache2 php5 libapache2-mod-php5 phpmyadmin
if purging php5 didn't remove the dependencies and you installed all the php5 packages also do a
Code:
aptitude purge php5-mysql php5-curl php5-gd php5-idn php-pear php5-imagick php5-imap php5-mcrypt php5-memcache php5-mhash php5-ming php5-ps php5-pspell php5-recode php5-snmp php5-sqlite php5-tidy php5-xmlrpc php5-xsl php5-json
3.- Reinstall the follow packages only
Code:
aptitude install php5 apache2 mysql-server mysql-client phpmyadmin
4.- Check your apache, mysql and phpmyadmin.
I'm not familiar with ubutu, installed it once the 7.06 LTS for a few days, i have been used Debian always.
You can get debian and give it a try
Let me know if this works.