apt-get install libpq-dev postgresql php5 php5-pgsql php5-imap php5-curl php5-cgi libyaml-perl libdbi-perl davical
emacs /etc/postgresql/9.4/main/pg_hba.conf

Add at the very top of the file:

local   davical    davical_app   trust
local   davical    davical_app   trust

Reload postgresql:

/etc/init.d/postgresql restart

Now:

cd /usr/share/davical/dba
su postgres -c /usr/share/davical/dba/create-database.sh

It gives message:

Supported locales updated.
Updated view: dav_principal.sql applied.
CalDAV functions updated.
RRULE functions updated.
Database permissions updated.
NOTE
====
*  The password for the 'admin' user has been set to 'something'
Thanks for trying DAViCal!  Check in /usr/share/doc/davical/examples/ for
some configuration examples.  For help, visit #davical on irc.oftc.net.

Create virtual server and edit the config:

emacs /etc/apache2/sites-available/davical.joel.co.in.conf
Davical wiki recommends the following:

<VirtualHost x.y.z.a>
	DocumentRoot /usr/share/davical/htdocs
	DirectoryIndex index.php index.html
	ServerName davical.yoursite.com
	ServerAlias calendar.yoursite.com
	Alias /images/ /usr/share/davical/htdocs/images/
	ErrorLog /var/log/virtualmin/davical.yoursite.com_error_log
	CustomLog /var/log/virtualmin/davical.yoursite.com_access_log combined
	<Directory /usr/share/davical/htdocs/>
		  AllowOverride None
		  Order allow,deny
		  Allow from all
	</Directory>
	AcceptPathInfo On
</VirtualHost>

But only the following worked:

<VirtualHost *:80>
ServerName davical.yoursite.com
ServerAlias calendar.yoursite.com
DocumentRoot /usr/share/davical/htdocs
DirectoryIndex index.php index.html
Alias /images/ /usr/share/davical/htdocs/images/
ErrorLog /var/log/virtualmin/davical.yoursite.com_error_log
CustomLog /var/log/virtualmin/davical.yoursite.com_access_log combined
<Directory /usr/share/davical/htdocs/>
    Options -Indexes +IncludesNOEXEC +SymLinksIfOwnerMatch +ExecCGI
    allow from all
    AllowOverride All Options=ExecCGI,Includes,IncludesNOEXEC,Indexes,MultiViews,SymLinksIfOwnerMatch
    Require all granted
    AddType application/x-httpd-php .php
    AddHandler fcgid-script .php
    AddHandler fcgid-script .php5
    FCGIWrapper /home/joel/domains/davical.yoursite.com/fcgi-bin/php5.fcgi .php
    FCGIWrapper /home/joel/domains/davical.yoursite.com/fcgi-bin/php5.fcgi .php5
</Directory>
AcceptPathInfo On
</VirtualHost>

Now reload apache and the webpage.
Configure the file adding the following:

$c->admin_email = '[email protected]';
    $c->system_name = "DAViCal CalDAV Server";
      $c->enable_row_linking = true;
        $c->default_locale = 'en_US.UTF-8';

  $c->pg_connect[] = 'dbname=davical port=5432 user=davical_app';

Now reload the page and it should show login screen. Use the password that was earlier generated.

Joel G Mathew

Joel G Mathew, known in tech circles by the pseudonym Droidzone, is an opensource and programming enthusiast.

He is a full stack developer, whose favorite languages are currently Python and Vue.js. He is also fluent in Javascript, Flutter/Dart, Perl, PHP, SQL, C and bash shell scripting. He loves Linux, and can often be found tinkering with linux kernel code, and source code for GNU applications. He used to be an active developer on XDA forums, and his tinkered ROMS used to be very popular in the early 2000s.

His favorite pastime is grappling with GNU compilers, discovering newer Linux secrets, writing scripts, hacking roms, and programs (nothing illegal), reading, blogging. and testing out the latest gadgets.

When away from the tech world, Dr Joel G. Mathew is a practising ENT Surgeon, busy with surgeries and clinical practise.