Manual:Running MediaWiki on Arch Linux

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Arch Wiki has a page about MediaWiki that provides more details, but lacks paste-able code to quickly get things up and running. So the focus here is on just the basic recipe for a quick installation. Note the following commands should be run as root user (to get into root run su, for example).

Install Apache, PHP, MySQL, and MediaWiki[edit]

pacman -S mediawiki mariadb php apache php-apache

Optional packages[edit]

To enable cache on php (mediawiki will work faster):

pacman -S php-apcu

If your mediawiki database is encoded in binary php-intl will make the translation from binary to utf8 faster:

pacman -S php-intl

Set up MySQL (MariaDB)[edit]

This will do the basic configuration of MySQL (without this MySQL will fail to start):

mysql_install_db --user=mysql --basedir=/usr/ --ldata=/var/lib/mysql/

This will start MySQL and and enable the start at bootup:

systemctl start mysqld
systemctl enable mysqld

Set a database root password:

mysqladmin -u root password YOUR_DESIRED_PASSWORD_HERE
history -c

Set up Apache and PHP[edit]

cd /etc/webapps/mediawiki
grep -v open_basedir apache.example.conf > httpd-mediawiki.conf
cd /usr/share/webapps/mediawiki

If you already have a .htaccess file you can run

perl -p -i -e "s/deny/allow/" .htaccess

Otherwise you have to create one from scratch. A very basic (but insecure?) one could look like this:

cat >> .htaccess << EOF
order allow,deny
allow from all
cat >> /etc/httpd/conf/httpd.conf << EOF
LoadModule php7_module modules/
Include conf/extra/php7_module.conf
Include /etc/webapps/mediawiki/httpd-mediawiki.conf

As the Arch Wiki notes [1], mod_mpm_event does not work with So you need to open /etc/httpd/conf/httpd.conf and comment the line:

LoadModule mpm_event_module modules/

and then uncomment the line:

LoadModule mpm_prefork_module modules/

Edit /etc/php/php.ini and add ":/tmp:/usr/share/webapps/:/var/lib/mediawiki" at the end of the "open_basedir=" line. (/var/lib/mediawiki is the directory for uploads).

Then, also in /etc/php/php.ini , uncomment the following lines by removing the leading semicolons: (in the Dynamic Extensions section)

Now start Apache and tell systemd to launch it during boot:

systemctl start httpd
systemctl enable httpd

Use the browser to configure MediaWiki[edit]

Go to http://localhost/mediawiki/mw-config/index.php and follow the instructions. Enter the database root password you defined above in the appropriate box. Don't skip any parts of the installation even if the installer suggests it—you need those extra steps to enable file uploads and wiki extensions.

When configuration is finished, your browser will download the file LocalSettings.php. Copy it to /usr/share/webapps/mediawiki/. Your Wiki should now be accessible at http://localhost/mediawiki/.

Uploads and image thumbnails[edit]

If you have enabled image uploads in LocalSettings.php ($wgEnableUploads = true;), you may want to install ImageMagick

pacman -S imagemagick

and uncomment the lines

 $wgUseImageMagick = true;
 $wgImageMagickConvertCommand = "/usr/bin/convert";

in /usr/share/webapps/mediawiki/LocalSettings.php. Then restart Apache for the changes to take effect:

systemctl restart httpd