Update Contao

Backup

First of all backup your Contao database and root directory!

Change into the Contao root directory and execute the update command as apache user.

root$

sudo -u apache composer update

Within the Contao root directory clear the cache with:

root$

rm -R -f var/cache/*

Now check the Contao database for updates. Open the install.php and enter your installation password.

e.g. open https://www.your-domain.com/contao/install

Original guide for the Contao update from marcosimbuerger.ch