Webhosting
You can host your own personal webpage at Blinkenshell. To do this, put any files you want to be accessible via HTTP in the directory public_html in your home directory. The URL to your webpage will be https://username.u.blinkenshell.org/ (old accounts have no HTTPS and are available at http://username.blinkenshell.org instead, ask independence if you want to migrate to the new hostname and HTTPS)
If you have a file named index.html in your public_html directory that file will be used as the index page when someone browses to your site without requesting a specific file (i.e. https://username.u.blinkenshell.org/). If you do not have an index file a directory listing of all the files in your public_html will be shown instead.
You can use Apache .htaccess-files to customize the behaviour of your webpage. Apache documentation on htaccess.
Logs from apache are written to ~/logs/access.log (normal traffic) and ~/logs/error.log (errors). These files should not be removed.
CGI
CGI and PHP is only available on Supporter accounts.
You can use PHP and CGI scripts to create dynamic webpages. CGI and PHP scripts are executed with mod_fcgi and suexec, which will make all scripts execute with your user id instead of the Apache user.
PHP and Python are installed. You can install your own frameworks such as Django if you like, but they are not installed system-wide.
MySQL
For information on how to use MySQL, see: Info/MySQL.