Common problems

PostgreSQL service is running but installation wizard seems to be unable to connect to it

Probably your PostgreSQL server isn't allowing incoming connections through the network. Check the file pg_hba.conf (location in Fedora: /var/lib/pgsql/data/, Debian/Ubuntu: /etc/postgresql/<version>/main/). You will probably need to add the following lines:

# TYPE  DATABASE        USER            CIDR-ADDRESS            METHOD
# IPv4 local connections:
host    all             all             127.0.0.1/32            md5
# IPv6 local connections:
host    all             all             ::1/128                 md5

If your system uses SELinux (Fedora does), you also need to allow network connections from Apache to the database with:

setsebool -P httpd_can_network_connect_db 1

I can't start PostgreSQL server service in Fedora

Maybe you haven't set the storage files up. Check the actual reason of your problem with:

# systemctl status postgresql.service
systemd[1]: Starting PostgreSQL database server...
postgresql-check-db-dir[10598]: Directory "/var/lib/pgsql/data" is missing or empty.
postgresql-check-db-dir[10598]: Use "/usr/bin/postgresql-setup --initdb"
postgresql-check-db-dir[10598]: to initialize the database cluster.
postgresql-check-db-dir[10598]: See /usr/share/doc/postgresql/README.rpm-dist for more informa
systemd[1]: postgresql.service: Control process exited, code=exited status=1

Follow the instructions to fix it:

# /usr/bin/postgresql-setup --initdb
* Initializing database in '/var/lib/pgsql/data'
* Initialized, logs are in /var/lib/pgsql/initdb_postgresql.log

There's an error message: 'It is not safe to rely on the system's timezone settings'

Edit the configuration file php.ini, adding a line like the following one but changing Europe/Madrid with your own time zone:

date.timezone = Europe/Madrid

php.ini is usually located in:

Debian, Ubuntu: /etc/php5/apache2/php.ini
Fedora, Red Hat: /etc/php.ini
Windows: C:\PHP\php.ini

There are a lot of warning and error messages mixed with the content of the web application

Disable error output in PHP settings. Edit the configuration file php.ini and locate the parameter display_errors, changing its value to off:

display_errors = Off